Gaya APA

Technology (NIIT), N, I, O, I. (1980). Longman English Course (Edisi 1). Yogyakarta: PT Kanisius.

Gaya MLA

Technology (NIIT), National, Institute, Of, Information. "Longman English Course". Edisi 1 Yogyakarta: PT Kanisius, 1980. TEXT.