Gaya APA
Labaw, P, J., Rappeport, M, A. (1980).
Advanced Qusttionnaire Design .
Massachusetts:
Abt Books.
Gaya MLA
Labaw, Patricia, J.., Rappeport, Michael, A..
"Advanced Qusttionnaire Design".
Massachusetts:
Abt Books,
1980.
Mata Kuliah Pengembangan Kepri.