Cita APA (7a ed.)

Halford, N. G., & Karp, A. (2011). Energy crops. Royal Society of Chemistry.

Cita Chicago Style (17a ed.)

Halford, Nigel G., y A. Karp. Energy Crops. Cambridge: Royal Society of Chemistry, 2011.

Cita MLA (8a ed.)

Halford, Nigel G., y A. Karp. Energy Crops. Royal Society of Chemistry, 2011.