Cita APA (7a ed.)

Roberts, H. A. (1982). Weed control handbook: Principles (7th. ed.). Blackwell.

Cita Chicago Style (17a ed.)

Roberts, H. A. Weed Control Handbook: Principles. 7th. ed. Oxford: Blackwell, 1982.

Cita MLA (8a ed.)

Roberts, H. A. Weed Control Handbook: Principles. 7th. ed. Blackwell, 1982.