Cita APA (7a ed.)

Singh, A. K., & Singh, U. P. (1999). Human ecology and development in India. APH Publishing.

Cita Chicago Style (17a ed.)

Singh, Awadhesh Kumar, y Udai Pratap Singh. Human Ecology and Development in India. New Delhi: APH Publishing, 1999.

Cita MLA (9a ed.)

Singh, Awadhesh Kumar, y Udai Pratap Singh. Human Ecology and Development in India. APH Publishing, 1999.