Eco-geographically divergent diploids, Caucasian clover (Trifolium ambiguum) and western clover (T. occidentale), retain most requirements for hybridization.

MLA

Williams, Warren M., et al. “Eco-Geographically Divergent Diploids, Caucasian Clover (Trifolium Ambiguum) and Western Clover (T. Occidentale), Retain Most Requirements for Hybridization.” Annals of Botany, vol. 108, no. 7, Nov. 2011, pp. 1269–77. EBSCOhost, https://doi.org/10.1093/aob/mcr226.

APA

Williams, W. M., Verry, I. M., Ansari, H. A., Hussain, S. W., Ullah, I., Williamson, M. L., & Ellison, N. W. (2011). Eco-geographically divergent diploids, Caucasian clover (Trifolium ambiguum) and western clover (T. occidentale), retain most requirements for hybridization. Annals of Botany, 108(7), 1269–1277. https://doi.org/10.1093/aob/mcr226

Chicago

Williams, Warren M, Isabelle M Verry, Helal A Ansari, S Wajid Hussain, Ihsan Ullah, Michelle L Williamson, and Nicholas W Ellison. 2011. “Eco-Geographically Divergent Diploids, Caucasian Clover (Trifolium Ambiguum) and Western Clover (T. Occidentale), Retain Most Requirements for Hybridization.” Annals of Botany 108 (7): 1269–77. doi:10.1093/aob/mcr226.