Ager, D. V. (1975). Introducing geology: The earth's crust considered as history (2. Edition.). Faber and Faber.
Chicago-Zitierstil (17. Ausg.)Ager, Derek V. Introducing Geology: The Earth's Crust Considered as History. 2. Edition. London: Faber and Faber, 1975.
MLA-Zitierstil (9. Ausg.)Ager, Derek V. Introducing Geology: The Earth's Crust Considered as History. 2. Edition. Faber and Faber, 1975.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.