Gaya APA
Alexander, L.G.. (1975).
First Things First Student's Book (Cet.1).
Yogyakarta:
Kanisius.
Gaya Chicago
Alexander, L.G..
First Things First Student's Book.
Cet.1
Yogyakarta:
Kanisius,
1975.
Text.
Gaya MLA
Alexander, L.G..
First Things First Student's Book.
Cet.1
Yogyakarta:
Kanisius,
1975.
Text.
Gaya Turabian
Alexander, L.G..
First Things First Student's Book.
Cet.1
Yogyakarta:
Kanisius,
1975.
Print.