APA

Raup D. M. S. S. M., . (1971). Principles of paleontology. : W H Freeman & Company, London.

Chicago

Raup David M Stanley Steven M, . 1971. Principles of paleontology. : W H Freeman & Company, London.

Harvard

Raup D. M. S. S. M., . (1971). Principles of paleontology. : W H Freeman & Company, London.

MLA

Raup David M Stanley Steven M, . Principles of paleontology. : W H Freeman & Company, London. 1971.