Cita APA (7th ed.)

Tyagi, A. P. (1987). Introduction to palaeontology: (for university zoology and geology students) (2nd rev. ed.). S. Chand & Company Ltd.

Cita Chicago (17th ed.)

Tyagi, A. P. Introduction to Palaeontology: (for University Zoology and Geology Students). 2nd rev. ed. New Delhi: S. Chand & Company Ltd, 1987.

Cita MLA (9th ed.)

Tyagi, A. P. Introduction to Palaeontology: (for University Zoology and Geology Students). 2nd rev. ed. S. Chand & Company Ltd, 1987.