Gaya APA
G., A, L. (1978).
First Things First: Recorded Drills Tapescript (First Published).
Yogyakarta:
Penerbit Yayasan Kanisius.
Gaya MLA
G., Alexander, L..
"First Things First: Recorded Drills Tapescript".
First Published
Yogyakarta:
Penerbit Yayasan Kanisius,
1978.
Teksbook.