References
^ Warriner, John E. (2015). Warriner's Handbook: Fourth Course: Grammar, Usage, Mechanics, Sentences, Houghton Mifflin Harcourt School. BiggerBooks. ISBN 9780030990038 (revised Nov 2023)^ (2013). Holt Traditions Warriner's Handbook : Student Edition Fourth Course Grade 10 Fourth Course 2008 ECampus. ISBN 9780030990038 (revised Mar 2023)
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