APA (7th ed.) Citation

Leonardi, P., Rittmann, A., & Sommavilla, E. (1976). Volcanoes and impact craters on the Moon and Mars. Elsevier.

Chicago Style (17th ed.) Citation

Leonardi, Piero, Alfred Rittmann, and Elio Sommavilla. Volcanoes and Impact Craters on the Moon and Mars. Amsterdam ; New York: Elsevier, 1976.

MLA (9th ed.) Citation

Leonardi, Piero, et al. Volcanoes and Impact Craters on the Moon and Mars. Elsevier, 1976.