Martin Fey, W. c. b. J. H. (2012). Soils of South Africa (1.). Cambridge University Press.
Chicago (17e ed.) BronvermeldingMartin Fey, With contributions by Jeff Hughes. Soils of South Africa. 1. Cambridge University Press, 2012.
MLA (8e ed.) BronvermeldingMartin Fey, With contributions by Jeff Hughes. Soils of South Africa. 1. Cambridge University Press, 2012.
Let op: Deze citaties zijn niet altijd 100% accuraat.