Cita APA (7a ed.)

Roe, G., & Allen, M. (1999). A comparison of competing explanations for the 100,000-yr ice age cycle.

Cita Chicago Style (17a ed.)

Roe, G., y M. Allen. A Comparison of Competing Explanations for the 100,000-yr Ice Age Cycle. 1999.

Cita MLA (9a ed.)

Roe, G., y M. Allen. A Comparison of Competing Explanations for the 100,000-yr Ice Age Cycle. 1999.