Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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