एपीए उद्धरण

Cunningham, W. P., & Woodsworth, B. Environmental science: A global concern (5th ed.). Saigo.

शिकागो स्टाइल उद्धरण

Cunningham, William P., और Barbara Woodsworth. Environmental Science: A Global Concern. 5th ed. Saigo.

एमएलए उद्धरण

Cunningham, William P., और Barbara Woodsworth. Environmental Science: A Global Concern. 5th ed. Saigo.