Cita APA (7th ed.)

Stokes, W. L. (1966). Essentials of earth history. An introduction to historical geology (2a. ed.). Prentice-Hall.

Cita Chicago (17th ed.)

Stokes, William Lee. Essentials of Earth History. An Introduction to Historical Geology. 2a. ed. Englewood Cliffs: Prentice-Hall, 1966.

Cita MLA (9th ed.)

Stokes, William Lee. Essentials of Earth History. An Introduction to Historical Geology. 2a. ed. Prentice-Hall, 1966.