Cita APA (7a ed.)

Riches, C. (2001). The World's worst weeds. British Crop Protection Council.

Cita Chicago Style (17a ed.)

Riches, C.R. The World's Worst Weeds. [Lugar de publicación no identificado]: British Crop Protection Council, 2001.

Cita MLA (8a ed.)

Riches, C.R. The World's Worst Weeds. British Crop Protection Council, 2001.