Nichols, P. (1991). Social survey methods: A fieldguide for development workers. Oxfam Publications.
Chicago (17e ed.) BronvermeldingNichols, Paul. Social Survey Methods: A Fieldguide for Development Workers. Oxford: Oxfam Publications, 1991.
MLA (8e ed.) BronvermeldingNichols, Paul. Social Survey Methods: A Fieldguide for Development Workers. Oxfam Publications, 1991.
Let op: Deze citaties zijn niet altijd 100% accuraat.