Are you supposed to use two spaces after every period on the reference list page? As in, "Wilson, J. (2007). A guide to computers...."
(You can't see but there are 2 spaces after "...J." and after "...7).")
Answer
According to Publication Manual of the American Psychological Association, 6th edition -
"4.01 Spacing After Punctuation Marks
Insert one space after
- commas, colons, and semicolons;
- periods that separate parts of a reference citation; and
- periods of the initials in personal names (e.g., J. R. Zhang)." (pp. 87-88).
So, it looks like one space is the answer.