Gaya APA

R., C. (1997). [Business Research Methods. Bah. Indonesia] Metode Penelitian Bisnis Jilid I (Ed. 5, Cet. 2). Jakarta: Erlangga.

Gaya MLA

R., Cooper,Donald. "[Business Research Methods. Bah. Indonesia] Metode Penelitian Bisnis Jilid I". Ed. 5, Cet. 2 Jakarta: Erlangga, 1997. Text.