Citazione Stile APA (7a Edizione)

AGER, D. (1961). Introducing geology: The earth's crust considered as history. Faber and Faber.

Citazione stile Chigago Style (17a edizione)

AGER, D.V. Introducing Geology: The Earth's Crust Considered as History. London: Faber and Faber, 1961.

Citatione MLA (9a ed.)

AGER, D.V. Introducing Geology: The Earth's Crust Considered as History. Faber and Faber, 1961.