APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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