Azar, b. s. (1993). Understanding and using english grammar. Binarupa Aksara.
Cita Chicago (17th ed.)Azar, betty schrampher. Understanding and Using English Grammar. Binarupa Aksara, 1993.
Cita MLA (9th ed.)Azar, betty schrampher. Understanding and Using English Grammar. Binarupa Aksara, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.