APA

Rittmann A., Vincent E. A., . (1962). Volcanoes and their activity. New York: John Wiley.

Chicago

Rittmann A, Vincent E A, . 1962. Volcanoes and their activity. New York: John Wiley.

Harvard

Rittmann A., Vincent E. A., . (1962). Volcanoes and their activity. New York: John Wiley.

MLA

Rittmann A, Vincent E A, . Volcanoes and their activity. New York: John Wiley. 1962.