Robin L. Simmons
Grammar Bytes: Rules for Finding and Fixing Pronoun Reference Errors
Rules and examples to explain common errors in pronoun reference and how to avoid vague or misused pronouns.
Khan Academy
Khan Academy: Indefinite Pronouns
Which indefinite pronoun makes the most sense for each of these sentences?
Khan Academy
Khan Academy: Pronoun Vagueness
Help clarify the sentence by keeping or changing existing pronouns.