APA (7th ed.) Citation
Lal, R., Wilson, G., & Okigbo, B. (1979). Changes in properties of an alfisol produced by various crop covers.
Chicago Style (17th ed.) Citation
Lal, R., G. Wilson, and B.N Okigbo. Changes in Properties of an Alfisol Produced by Various Crop Covers. 1979.
MLA (9th ed.) Citation
Lal, R., et al. Changes in Properties of an Alfisol Produced by Various Crop Covers. 1979.
Warning: These citations may not always be 100% accurate.