Stokes, W. L. (1966). Essentials of earth history: An introduction to historical geology. Prentice-Hall.
Citazione stile Chigago Style (17a edizione)Stokes, William Lee. Essentials of Earth History: An Introduction to Historical Geology. Englewood Cliffs, NJ: Prentice-Hall, 1966.
Citatione MLA (9a ed.)Stokes, William Lee. Essentials of Earth History: An Introduction to Historical Geology. Prentice-Hall, 1966.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.