Gaya APA
Babbie, Earl. (2005).
The Basic of social research (3e).
Belmont:
Thomson Wadsworth.
Gaya Chicago
Babbie, Earl.
The Basic of social research.
3e
Belmont:
Thomson Wadsworth,
2005.
Buku.
Gaya MLA
Babbie, Earl.
The Basic of social research.
3e
Belmont:
Thomson Wadsworth,
2005.
Buku.
Gaya Turabian
Babbie, Earl.
The Basic of social research.
3e
Belmont:
Thomson Wadsworth,
2005.
Buku.