Cita APA (7th ed.)

Willis, H. (1971). Basic usage, vocabulary, and composition. Holt Rinehart and Winston.

Cita Chicago (17th ed.)

Willis, Hulon. Basic Usage, Vocabulary, and Composition. New York: Holt Rinehart and Winston, 1971.

Cita MLA (9th ed.)

Willis, Hulon. Basic Usage, Vocabulary, and Composition. Holt Rinehart and Winston, 1971.