Gaya APA
Nasution, .
(2014).
Metode Research (Penelitian Ilmiah)
(
1th. Ed Cet.14)
.
Jakarta:
Bumi Aksara.
Gaya MLA
Nasution, .
"Metode Research (Penelitian Ilmiah)".
1th. Ed Cet.14
Jakarta:
Bumi Aksara,
2014.
Text.