Dictionary.com Style Guide

Punctuation
Capitalization, Italicization and Underlining
Footnotes, Online Sources, Bibliographies
Style Guide for:

Miscellaneous:

Abbreviations
Affixes (Prefixes, Suffixes)
Animal Group, Young Names, and Male/Female Names
Abbreviations of Months and Days

Appendix I. A guide to proper nouns, covering: Companies, Organizations, Languages, Trademarks and Tradenames
Appendix II. A guide to Word Division