Gaya APA

Alter, J. (1991). Essential English Usage and Grammer 1 / J.B.Alter (Cet. 1). Jakarta: Binarupa Aksara.

Gaya MLA

Alter, J.B. "Essential English Usage and Grammer 1 / J.B.Alter". Cet. 1 Jakarta: Binarupa Aksara, 1991. Text.