Gaya APA
Nasution, S.. (1991).
Metode research: penelitian ilmiah .
Bandung:
Jemmars.
Gaya Chicago
Nasution, S..
Metode research: penelitian ilmiah.
Bandung:
Jemmars,
1991.
Text.
Gaya MLA
Nasution, S..
Metode research: penelitian ilmiah.
Bandung:
Jemmars,
1991.
Text.
Gaya Turabian
Nasution, S..
Metode research: penelitian ilmiah.
Bandung:
Jemmars,
1991.
Print.