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Handout
University of Ottawa (Canada)

U of Ottawa Hyper Grammar: Punctuation

For Students 9th - 10th
Writing center tutorial for how to correctly use various types of punctuation, including the apostrophe in contractions, possessives, and pronouns.
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Handout
Online Writing Lab at Purdue University

Purdue University Owl: Possessive Pronoun and Apostrophe

For Students 9th - 10th
This Purdue Online Writing Lab article explains the three uses of the apostrophe.