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.