Gaya APA

Marsh, W, M., Kaufman, M, M. (2013). Physical Geography: Great System and Global Environments (1). New York: CAMBRIDGE UNIVERSITY PRESS.

Gaya MLA

Marsh, William, M.., Kaufman, Martin, M.. "Physical Geography: Great System and Global Environments". 1 New York: CAMBRIDGE UNIVERSITY PRESS, 2013. Text.