Cita APA (7a ed.)

Tivy, J. (1990). Agricultural ecology. Longman Scientific & Technical [etc.].

Cita Chicago Style (17a ed.)

Tivy, Joy. Agricultural Ecology. Harlow [etc.]: Longman Scientific & Technical [etc.], 1990.

Cita MLA (9a ed.)

Tivy, Joy. Agricultural Ecology. Longman Scientific & Technical [etc.], 1990.