Gaya APA

Strahler, A., Strahler, A. (2005). Introducing physical geography : Alan Strahler (ed. 3). New York: John Wiley \r Sons, Inc..

Gaya MLA

Strahler, Alan., Strahler, Arthur.. "Introducing physical geography : Alan Strahler". ed. 3 New York: John Wiley \r Sons, Inc., 2005. Buku.