Gaya APA

Salant, P., Dillman, D, A. (1994). How To Conduct Your Own Survey Leading Professionals Give Your Proven Techniques for Getting Reliable Results . America: John Wiley & Sons,Inc.

Gaya MLA

Salant, Priscilla., Dillman, Don, A.. "How To Conduct Your Own Survey Leading Professionals Give Your Proven Techniques for Getting Reliable Results". America: John Wiley & Sons,Inc, 1994. Buku PPS Pend. Biologi.