Gaya APA

JMK, D., Strahler, A, N. (1984). Geografi Fizikal (Ed. 4). Singapore: John Wiley and Sons.

Gaya MLA

JMK, Dake., Strahler, Arthur, N. "Geografi Fizikal". Ed. 4 Singapore: John Wiley and Sons, 1984. Text.