Gaya APA

Febriani, S., Maggs, M. (1978). Grolier English Programmed Course 3 (-). America: Grolier International, Inc.

Gaya MLA

Febriani, Siska., Maggs, Margaret. "Grolier English Programmed Course 3". - America: Grolier International, Inc, 1978. Text.