APA (7th ed.) Citation
Okpara, D., Ikeorgu, J., Njoku, J., & Tarawali, G. (2009). Effect of threeyear fallow with herbaceous cover legumes on soil fertility and sweetpotato production in southeastern Nigeria.
Chicago Style (17th ed.) Citation
Okpara, D.A, J.G Ikeorgu, J.C Njoku, and G. Tarawali. Effect of Threeyear Fallow with Herbaceous Cover Legumes on Soil Fertility and Sweetpotato Production in Southeastern Nigeria. 2009.
MLA (9th ed.) Citation
Okpara, D.A, et al. Effect of Threeyear Fallow with Herbaceous Cover Legumes on Soil Fertility and Sweetpotato Production in Southeastern Nigeria. 2009.
Warning: These citations may not always be 100% accurate.