Citazione Stile APA (7a Edizione)

Polunin, N. (1986). Ecosystem theory and application. Wiley.

Citazione stile Chigago Style (17a edizione)

Polunin, Nicholas. Ecosystem Theory and Application. Chichester, [West Sussex] ; New York: Wiley, 1986.

Citatione MLA (8a ed.)

Polunin, Nicholas. Ecosystem Theory and Application. Wiley, 1986.