Gaya APA

Alexander, L, G. (1978). NEW CONCEPT ENGLISH PRACTICE AND PROGRESS (1). Yogyakarta: Kanasius (Anggota IKAPI).

Gaya MLA

Alexander, L, G. "NEW CONCEPT ENGLISH PRACTICE AND PROGRESS". 1 Yogyakarta: Kanasius (Anggota IKAPI), 1978. Text.