APA (7th ed.) Citation

Swinnerton, H. H. (1930). Outlines of palontology (2d. ed.). E. Arnold & Co..

Chicago Style (17th ed.) Citation

Swinnerton, H. H. Outlines of Palontology. 2d. ed. London: E. Arnold & Co., 1930.

MLA (9th ed.) Citation

Swinnerton, H. H. Outlines of Palontology. 2d. ed. E. Arnold & Co., 1930.