Gaya APA

SARIS, W, E., GALLHOFER, I, N. (2007). Design, evaluation, and analysis of questionnaires for survey research . New Jersey: Jogn Wiley & Sons.

Gaya MLA

SARIS, Willem, E.., GALLHOFER, Irmtraud, N.. "Design, evaluation, and analysis of questionnaires for survey research". New Jersey: Jogn Wiley & Sons, 2007. Buku.