Cita APA (7a ed.)
Powell, J. (1986). Manure for cropping: Case study from central Nigeria. Cambridge University Press.
Cita Chicago Style (17a ed.)
Powell, J.M. Manure for Cropping: Case Study from Central Nigeria. Cambridge University Press, 1986.
Cita MLA (9a ed.)
Powell, J.M. Manure for Cropping: Case Study from Central Nigeria. Cambridge University Press, 1986.
Precaución: Estas citas no son 100% exactas.