Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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