Singh Harjendra. An introduction to paleontology (1st.). C.K. Arora.
Cita Chicago (17th ed.)Singh Harjendra. An Introduction to Paleontology. 1st. New Delhi: C.K. Arora.
Cita MLA (9th ed.)Singh Harjendra. An Introduction to Paleontology. 1st. C.K. Arora.
Atenció: Aquestes cites poden no estar 100% correctes.