Gaya APA
Gulo, W.. (2002).
Metodologi Penelitian .
Jakarta:
PT Gramedia Widiasarana Indonesia.
Gaya Chicago
Gulo, W..
Metodologi Penelitian.
Jakarta:
PT Gramedia Widiasarana Indonesia,
2002.
Electronic Resource.
Gaya MLA
Gulo, W..
Metodologi Penelitian.
Jakarta:
PT Gramedia Widiasarana Indonesia,
2002.
Electronic Resource.
Gaya Turabian
Gulo, W..
Metodologi Penelitian.
Jakarta:
PT Gramedia Widiasarana Indonesia,
2002.
Electronic Resource.