APA (7th ed.) Citation

Knovel (Firm) & Allaby, M. (2008). A dictionary of earth sciences (3rd ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Knovel (Firm) and Michael Allaby. A Dictionary of Earth Sciences. 3rd ed. Oxford: Oxford University Press, 2008.

MLA (9th ed.) Citation

Knovel (Firm) and Michael Allaby. A Dictionary of Earth Sciences. 3rd ed. Oxford University Press, 2008.