Cita APA (7th ed.)

Kumar, H. D. (1990). Modern concepts of ecology (2nd ed.). Vikas Publishing House.

Cita Chicago (17th ed.)

Kumar, H. D. Modern Concepts of Ecology. 2nd ed. New Delhi: Vikas Publishing House, 1990.

Cita MLA (9th ed.)

Kumar, H. D. Modern Concepts of Ecology. 2nd ed. Vikas Publishing House, 1990.