Gaya APA
Gravetter, Frederick J. (2015).
Research Methods: For The Behavioral Sciences (5th Edition).
USA:
Cengage Learning.
Gaya Chicago
Gravetter, Frederick J.
Research Methods: For The Behavioral Sciences.
5th Edition
USA:
Cengage Learning,
2015.
Text.
Gaya MLA
Gravetter, Frederick J.
Research Methods: For The Behavioral Sciences.
5th Edition
USA:
Cengage Learning,
2015.
Text.
Gaya Turabian
Gravetter, Frederick J.
Research Methods: For The Behavioral Sciences.
5th Edition
USA:
Cengage Learning,
2015.
Print.