Gaya APA
Primary english skills 2. (1991).
Malang:
Binarupa Aksara.
Gaya Chicago
Primary english skills 2.
.
Malang:
Binarupa Aksara,
1991.
Text.
Gaya MLA
Primary english skills 2.
.
Malang:
Binarupa Aksara,
1991.
Text.
Gaya Turabian
Primary english skills 2.
Malang:
Binarupa Aksara,
1991.
Print.