Gaya APA

Mackenzie, F, T. (1998). Our changing planet : an introduction to earth system science and global environmental change (2nd ed). Upper Saddle River, NJ: Prentice Hall.

Gaya MLA

Mackenzie, Fred, T.. "Our changing planet : an introduction to earth system science and global environmental change". 2nd ed Upper Saddle River, NJ: Prentice Hall, 1998. Text.