Gaya APA

Ley, W. (1981). Pustaka Alam Life: Kutub (Ed. 2. Cet. 1--). Jakarta: Tira Pustaka.

Gaya MLA

Ley, Willy. "Pustaka Alam Life: Kutub". Ed. 2. Cet. 1-- Jakarta: Tira Pustaka, 1981. Text.