APA (7th ed.) Citation
Singh, U., Ladha, J., Castillo, E., Punzalan, G., Tirol-Padre, A., & Duqueza, M. (1998). Genotypic variation in nitrogen use efficiency in medium- and long-duration rice. Elsevier.
Chicago Style (17th ed.) Citation
Singh, U., J.K Ladha, E.G Castillo, G. Punzalan, A. Tirol-Padre, and M. Duqueza. Genotypic Variation in Nitrogen Use Efficiency in Medium- and Long-duration Rice. Elsevier, 1998.
MLA (9th ed.) Citation
Singh, U., et al. Genotypic Variation in Nitrogen Use Efficiency in Medium- and Long-duration Rice. Elsevier, 1998.
Warning: These citations may not always be 100% accurate.