Publication Manual of the American Psychological Association.
Section 2.14 Appendices (pp. 41-42)
Section 2.17 Order of Pages (p. 43)
Section 2.24 Paragraph Indentation (pp. 45-46)
Section 7.6 Placement of Tables (p. 198)
According to Microsoft: "A table of contents in Word is based on the headings in your document" and "missing entries often happen because headings aren't formatted as headings."