English Plus+
Grammar Slammer's Apostrophes Showing Possession
This site discusses the correct and incorrect usage of apostrophes to show possession and examples are provided. Note that links are provided at the bottom of the page for other specific uses of the apostrophe.
English Plus+
Plural Possessives
This site discusses the correct and incorrect usage of apostrophes to show possession with plural nouns.
Capital Community College Foundation
Guide to Grammar and Writing: The Apostrophe
What is an apostrophe? Where are apostrophes found in writing? Use this website to learn more about these crazy little punctuation marks.
SUNY Empire State College
Empire State College: Apostrophes
This resource looks at the three main uses of apostrophes: to take the place of deleted letters; to show possession; and to show plurals of letters, numbers, symbols, abbreviations and words used as words.
Other
Punctuation Mark Rules: The Apostrophe
An informational site detailing some of the uses and misuses of the "apostrophe" in English punctuation. Also includes several examples.
Other
Illinois State U.: Punctuation Made Simple Apostrophes
What is an apostrophe and how is it used properly in punctuation? "Punctuation Made Simple," gives some concrete examples for apostrophe use.
Other
Sandhills Community College: The Apostrophe
A valuable resource for learning about the uses of the apostrophe in English punctuation, including apostrophes with possessive nouns as well as contractions. Provides examples.
Online Writing Lab at Purdue University
Purdue University Owl: Possessive Pronoun and Apostrophe
This Purdue Online Writing Lab article explains the three uses of the apostrophe.
ACT360 Media
Writing Tips: Sentence Builder: Apostrophe
A brief description of the rules, usage, and examples of the "apostrophe" in English punctuation.
Other
Sta: Punctuation and Capitalization Rules
Use this handy guide for a quick reference to punctuation and capitalization rules. Includes rules for end marks, apostrophes, capitalization, commas, quotation marks, and many more!