Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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