APA (7th ed.) Citation

Ager, D. V. (1973). The nature of the stratigraphical record. Macmillan.

Chicago Style (17th ed.) Citation

Ager, Derek V. The Nature of the Stratigraphical Record. London: Macmillan, 1973.

MLA (9th ed.) Citation

Ager, Derek V. The Nature of the Stratigraphical Record. Macmillan, 1973.