Clifford, N. J., & Valentine, G. (2010). Key methods in geography (2nd ed.). Sage.
Chicago (17e ed.) BronvermeldingClifford, Nicholas J., en Gill Valentine. Key Methods in Geography. 2nd ed. Thousand Oaks, CA: Sage, 2010.
MLA (9e ed.) BronvermeldingClifford, Nicholas J., en Gill Valentine. Key Methods in Geography. 2nd ed. Sage, 2010.
Let op: Deze citaties zijn niet altijd 100% accuraat.