Cita APA (7a ed.)

Clarholm, M., & Bergström, L. (1989). Ecology of arable land: Perspectives and challegens, proceedings. Kluwer Academic.

Cita Chicago Style (17a ed.)

Clarholm, Marianne, y L. Bergström. Ecology of Arable Land: Perspectives and Challegens, Proceedings. Dordrecht: Kluwer Academic, 1989.

Cita MLA (8a ed.)

Clarholm, Marianne, y L. Bergström. Ecology of Arable Land: Perspectives and Challegens, Proceedings. Kluwer Academic, 1989.