Cita APA

Rittmann, A., & Rittmann, L. (1976). Volcanoes. Orbis.

Citación estilo Chicago

Rittmann, A., and L. Rittmann. Volcanoes. Londres: Orbis, 1976.

Cita MLA

Rittmann, A., and L. Rittmann. Volcanoes. Orbis, 1976.

Warning: These citations may not always be 100% accurate.