Martin Fey, W. c. b. J. H. (2012). Soils of South Africa (1.). Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMartin Fey, With contributions by Jeff Hughes. Soils of South Africa. 1. Cambridge University Press, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMartin Fey, With contributions by Jeff Hughes. Soils of South Africa. 1. Cambridge University Press, 2012.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.