Gaya APA
Belson, William A.. (1981).
The design and understanding of survey questions William A. Belson .
England:
Gower.
Gaya Chicago
Belson, William A..
The design and understanding of survey questions William A. Belson.
England:
Gower,
1981.
Text.
Gaya MLA
Belson, William A..
The design and understanding of survey questions William A. Belson.
England:
Gower,
1981.
Text.
Gaya Turabian
Belson, William A..
The design and understanding of survey questions William A. Belson.
England:
Gower,
1981.
Print.