Gaya APA
J., H.
(1993).
Longman English Course : Book 3a
(
Cet. 12.--)
.
Yogyakarta:
Kanisius.
Gaya MLA
J., Hobbs.
"Longman English Course : Book 3a".
Cet. 12.--
Yogyakarta:
Kanisius,
1993.
Text.