Stokes, W. L. (1973). Essentials of earth history: An introduction to historical geology (3d ed.). Prentice-Hall.
Citazione stile Chigago Style (17a edizione)Stokes, William Lee. Essentials of Earth History: An Introduction to Historical Geology. 3d ed. Englewood Cliffs, N.J: Prentice-Hall, 1973.
Citatione MLA (9a ed.)Stokes, William Lee. Essentials of Earth History: An Introduction to Historical Geology. 3d ed. Prentice-Hall, 1973.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.