Q. Do I need to italicize p in my statistical results when citing in APA?

Statistical and mathematical are presented in three different types according to their categories:

1. Greek letters, subscripts, superscripts and abbreviations not variable are presented in standard type (i.e. ß i).

2. Symbols for Vectors and matrices are in boldface (i.e. Σ).

3. All other statistical symbols are italicized (i.e. p, t).