Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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