APA aipamena

Trochim,William M K. (2003). Research methods (2.). Biztantra.

Chicago Style aipamena

Trochim,William M K. Research Methods. 2. New Delhi: Biztantra, 2003.

MLA aipamena

Trochim,William M K. Research Methods. 2. Biztantra, 2003.