Citazione Stile APA (7a Edizione)

Open University. Course Team. (1974). Ecology : science: A third level course. The Open University Press.

Citazione stile Chigago Style (17a edizione)

Open University. Course Team. Ecology : Science: A Third Level Course. Milton Keynes: The Open University Press, 1974.

Citatione MLA (9a ed.)

Open University. Course Team. Ecology : Science: A Third Level Course. The Open University Press, 1974.