APA
Barnett V., Barnett V., . (2002). Sample survey. London: Arnold.
Chicago
Barnett Vic, Barnett Vic, . 2002. Sample survey. London: Arnold.
Harvard
Barnett V., Barnett V., . (2002). Sample survey. London: Arnold.
MLA
Barnett Vic, Barnett Vic, . Sample survey. London: Arnold. 2002.