Cita APA (7th ed.)

Glencoe Publishing Co. Writer's choice: Grammar and composition.

Cita Chicago (17th ed.)

Glencoe Publishing Co. Writer's Choice: Grammar and Composition.

Cita MLA (8th ed.)

Glencoe Publishing Co. Writer's Choice: Grammar and Composition.

Atenció: Aquestes cites poden no estar 100% correctes.