Gaya APA

Christabel, . et al (1963). **Glaciers and the ice age earth and its inhabitants during the pleistocene . New York: New York: Holt, Rinehart and Winston; 1963..

Gaya MLA

Christabel, . et al. "**Glaciers and the ice age earth and its inhabitants during the pleistocene". New York: New York: Holt, Rinehart and Winston; 1963., 1963. Text.