APA (7th ed.) Zitazioa

Singh Harjendra. An introduction to paleontology (1st.). C.K. Arora.

Chicago Style (17th ed.) Zitazioa

Singh Harjendra. An Introduction to Paleontology. 1st. New Delhi: C.K. Arora.

MLA (9th ed.) Zitazioa

Singh Harjendra. An Introduction to Paleontology. 1st. C.K. Arora.