Cita APA (7a ed.)

Schrampfer Azar, B. (1996). Basic english grammar (2.). Prentice Hall.

Cita Chicago Style (17a ed.)

Schrampfer Azar, Betty. Basic English Grammar. 2. España: Prentice Hall, 1996.

Cita MLA (8a ed.)

Schrampfer Azar, Betty. Basic English Grammar. 2. Prentice Hall, 1996.