Cita APA (7th ed.)

Graver, B. D. (1971). Advanced english practice (2a. ed.). Oxford University Press.

Cita Chicago (17th ed.)

Graver, B. D. Advanced English Practice. 2a. ed. Oxford: Oxford University Press, 1971.

Cita MLA (9th ed.)

Graver, B. D. Advanced English Practice. 2a. ed. Oxford University Press, 1971.