APA (7th ed.) Citation

Onakpa, M. M., Njan, A. A., & Kalu, O. C. (2018). A Review of Heavy Metal Contamination of Food Crops in Nigeria. Ubiquity Press.

Chicago Style (17th ed.) Citation

Onakpa, Michael Monday, Anoka Ayembe Njan, and Ogbureke Chidiebere Kalu. A Review of Heavy Metal Contamination of Food Crops in Nigeria. Ubiquity Press, 2018.

MLA (8th ed.) Citation

Onakpa, Michael Monday, et al. A Review of Heavy Metal Contamination of Food Crops in Nigeria. Ubiquity Press, 2018.