Cita APA (7a ed.)

Holmes, A. (1927). The age of the Earth: An introduction to geological ideas. Ernest Benn.

Cita Chicago Style (17a ed.)

Holmes, Arthur. The Age of the Earth: An Introduction to Geological Ideas. London: Ernest Benn, 1927.

Cita MLA (8a ed.)

Holmes, Arthur. The Age of the Earth: An Introduction to Geological Ideas. Ernest Benn, 1927.