Gaya APA
Moser, S, C., Kalton, G. (1980).
Survey methods in sosial investigation .
Suffoler:
The Englis language book society.
Gaya MLA
Moser, Sir, Claus., Kalton, Graham.
"Survey methods in sosial investigation".
Suffoler:
The Englis language book society,
1980.
Text.