Gaya APA

Schoenberg, Irene E.. (1999). Focus On Grammar -ed 2 (2nd ed.). New York: PEARSON EDUCATION COMPANY.

Gaya Chicago

Schoenberg, Irene E.. Focus On Grammar -ed 2. 2nd ed. New York: PEARSON EDUCATION COMPANY, 1999. .

Gaya MLA

Schoenberg, Irene E.. Focus On Grammar -ed 2. 2nd ed. New York: PEARSON EDUCATION COMPANY, 1999. .

Gaya Turabian

Schoenberg, Irene E.. Focus On Grammar -ed 2. 2nd ed. New York: PEARSON EDUCATION COMPANY, 1999. .