Cita APA

Ivens, G. W., & Ivens, G. W. (1967). East african weeds and their control. Nairobi: Oxford University Press.

Citación estilo Chicago

Ivens, G. W., y G. W. Ivens. East African Weeds and Their Control. Nairobi: Oxford University Press, 1967.

Cita MLA

Ivens, G. W., y G. W. Ivens. East African Weeds and Their Control. Nairobi: Oxford University Press, 1967.