APA-referens (7:e uppl.)

Smith, G. A., & Pun, A. (2006). How does Earth work?: Physical geology and the process of science. Pearson Prentice Hall.

Chicago-referens (17:e uppl.)

Smith, Gary A., och Aurora Pun. How Does Earth Work?: Physical Geology and the Process of Science. Upper Saddle River, N.J: Pearson Prentice Hall, 2006.

MLA-referens (9:e uppl.)

Smith, Gary A., och Aurora Pun. How Does Earth Work?: Physical Geology and the Process of Science. Pearson Prentice Hall, 2006.