Cita APA (7a ed.)

Röbbelen, G., Downey, R. K., & Ashri, A. (1989). Oil crops of the world: Their breeding and utilization. McGraw-Hill.

Cita Chicago Style (17a ed.)

Röbbelen, Gerhard, R. Keith Downey, y Amron Ashri. Oil Crops of the World: Their Breeding and Utilization. New York: McGraw-Hill, 1989.

Cita MLA (8a ed.)

Röbbelen, Gerhard, et al. Oil Crops of the World: Their Breeding and Utilization. McGraw-Hill, 1989.