APA aipamena

Trochim, W. M. (2007). Research methods (2nd.). Biztantra.

Chicago Style aipamena

Trochim, William M.K. Research Methods. 2nd. New Delhi: Biztantra, 2007.

MLA aipamena

Trochim, William M.K. Research Methods. 2nd. Biztantra, 2007.