My 2 cents.
First off, I'm in Yankee land, and so, our punctuation (AmE) is probably going to differ from those on the other side of the pond, which would be the BrE (and in other former BrE lands).
In commercially printed stories in AmE, it is extremely rare to see the use of three ellipsis points to end a block of text where the first point is in the location of where a period (full stop) could be located--which is the spot right next to the last character,
e.g.,
I think that practice might be somewhat common in BrE, but I don't know.
For us yankees (AmE), one of the following is more common,
AmE: This could be an ending ellipsis . . .
AmE: This could be an ending ellipsis. . . .
For punctuation in fiction prose, many of us (AmE) tend to sorta rely somewhat on what
The Chicago Manual of Style (CMoS) suggests.
CMoS has recently put out a 16th edition, which I'm not planning to pick up. But I do have a copy of the 14th and 15th editions handy. Ellipsis points is handled better in the 14th edition, imo, while the 15th seems to make the usage more complicated.
Basically, in the 14th edition, there are two common methods:
-- 3 dots, where basically three ellipsis points are used, with spaces between and before and after each point, e.g., ". . . in the house . . . and ended . . ." which means that an ellipsis point will (usually) not be located in the spot right next to any adjoining text (except for some punctuation marks, e.g., double quotation marks). And this 3 dot sequence is used everywhere in the text, including the end of a block of text. I tend to think this is a very easy and simple method.
-- 2nd method (which is sorta recommended by CMoS 14th edition), which is more complicated and could sometimes end up having four dots for the ellipsis (where the 1st dot acts like the period (full stop) to end a sentence).
CMoS 15th edition, it gets more complicated as it mentions three common methods: a three-dot method, a three-or-four-dot method, a rigorous method (a refinement of the three-or-four-dot method). . . .
And of course, writers and editors that have to follow a style guide, well then they'll probably have to check out that guide for guidance or something, maybe. . . .
Anyway . . .
As for those using BrE, well, I guess all I can actually do is shrug for you all as I don't really know much about that.
Hope this helps.
imo.
Edited to add:
Whoops! Just noticed this at the bottom of the OP's post,
If it makes any difference, this is something I'm preparing according to APA guidelines.
Er, guess ya might as well ignore my post.
Hey! The OP's post was in March of 2009! ... er! Run and scatter! A vampire thread has risen!