Cita APA (7a ed.)

Stokes, W. L., & Judson, S. (1968). Introduction to geology, physical and historical. Prentice-Hall.

Cita Chicago Style (17a ed.)

Stokes, William Lee, y Sheldon Judson. Introduction to Geology, Physical and Historical. Englewood Cliffs, N.J: Prentice-Hall, 1968.

Cita MLA (9a ed.)

Stokes, William Lee, y Sheldon Judson. Introduction to Geology, Physical and Historical. Prentice-Hall, 1968.