Lal, S. S. (1993). A Text Book of Practical Zoology: Invertebrate (7th ed.). Rastogi.
Cita Chicago (17th ed.)Lal, S. S. A Text Book of Practical Zoology: Invertebrate. 7th ed. India: Rastogi, 1993.
Cita MLA (9th ed.)Lal, S. S. A Text Book of Practical Zoology: Invertebrate. 7th ed. Rastogi, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.