Gaya APA
Babbie, Earl. (2016).
The basics of social research (7th ed.).
Massachusetts:
Cengage Learning..
Gaya Chicago
Babbie, Earl.
The basics of social research.
7th ed.
Massachusetts:
Cengage Learning.,
2016.
Text.
Gaya MLA
Babbie, Earl.
The basics of social research.
7th ed.
Massachusetts:
Cengage Learning.,
2016.
Text.
Gaya Turabian
Babbie, Earl.
The basics of social research.
7th ed.
Massachusetts:
Cengage Learning.,
2016.
Print.