Azar, B. S. (1993). Chartbook: A reference grammar (2nd ed.). Prentice Hall.
Cita Chicago (17th ed.)Azar, Betty Schampfer. Chartbook: A Reference Grammar. 2nd ed. New Jersey: Prentice Hall, 1993.
Cita MLA (9th ed.)Azar, Betty Schampfer. Chartbook: A Reference Grammar. 2nd ed. Prentice Hall, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.