Gaya APA

Alter, J. (1991). Guided english skills : composition, comprehension, vocabulary use of english (primary 3)/ J.B. Alter . Jakarta: Binarupa Aksara.

Gaya MLA

Alter, J.B.. "Guided english skills : composition, comprehension, vocabulary use of english (primary 3)/ J.B. Alter". Jakarta: Binarupa Aksara, 1991. Text.