Παραπομπή APA

Marsh, W. M., & Kaufman, M. M. (2013). Physical geography: Great systems and global environments. Cambridge University Press.

Παραπομπή Chicago Style

Marsh, William M., και Martin M. Kaufman. Physical Geography: Great Systems and Global Environments. Cambridge ; New York: Cambridge University Press, 2013.

Παραπομπή MLA

Marsh, William M., και Martin M. Kaufman. Physical Geography: Great Systems and Global Environments. Cambridge University Press, 2013.