Verma, P. S. (1972). A Manual of Practical Zoology Chordates. S. Chand and Company.
Cita Chicago (17th ed.)Verma, P. S. A Manual of Practical Zoology Chordates. New Delhi: S. Chand and Company, 1972.
Cita MLA (9th ed.)Verma, P. S. A Manual of Practical Zoology Chordates. S. Chand and Company, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.