APA-viite

Udai Pratap Singh & Awadhesh Kumar Singh. (1999). Human ecology and development in India. A P H.

Chicago-tyylinen lähdeviittaus

Udai Pratap Singh ja Awadhesh Kumar Singh. Human Ecology and Development in India. New Delhi: A P H, 1999.

MLA-viite

Udai Pratap Singh ja Awadhesh Kumar Singh. Human Ecology and Development in India. A P H, 1999.