APA (7th ed.) Citation
Singh, S., Debouck, D. G., & Urrea, C. A. (1990). Variation for bracteoles and its association with races of common bean.
Chicago Style (17th ed.) Citation
Singh, S.P, Daniel G. Debouck, and Carlos A. Urrea. Variation for Bracteoles and Its Association with Races of Common Bean. 1990.
MLA (9th ed.) Citation
Singh, S.P, et al. Variation for Bracteoles and Its Association with Races of Common Bean. 1990.
Warning: These citations may not always be 100% accurate.