Gaya APA

al., E. et al (1999). The Gramer Book: An Esl / Efl Teachers Course (Ed. 2). New York USA: Heinle Publishers.

Gaya MLA

al., Et. et al. "The Gramer Book: An Esl / Efl Teachers Course". Ed. 2 New York USA: Heinle Publishers, 1999. Text.