Gaya APA
Allen, W, S. (1968).
Living English Structure: Practice Book for Foreign Student .
Longmans:
P.T. Dian Rakjat.
Gaya MLA
Allen, W., Stannard.
"Living English Structure: Practice Book for Foreign Student".
Longmans:
P.T. Dian Rakjat,
1968.
Teksbook.