Cita APA (7a ed.)

Jeffreys, H. (1929). The earth: Its origin, history and phisical constitution (2nd ed.). Cambridge University Press.

Cita Chicago Style (17a ed.)

Jeffreys, Harold. The Earth: Its Origin, History and Phisical Constitution. 2nd ed. London: Cambridge University Press, 1929.

Cita MLA (8a ed.)

Jeffreys, Harold. The Earth: Its Origin, History and Phisical Constitution. 2nd ed. Cambridge University Press, 1929.