APA (7th ed.) Citation

Qaderi, M. M., Clements, D. R., & Cavers, P. B. (2009). The biology of Canadian weeds. 139. Rhamnus cathartica L. Canadian Journal of Plant Science, 89(1), 169.

Chicago Style (17th ed.) Citation

Qaderi, Mirwais M., David R. Clements, and Paul B. Cavers. "The Biology of Canadian Weeds. 139. Rhamnus Cathartica L." Canadian Journal of Plant Science 89, no. 1 (2009): 169.

MLA (9th ed.) Citation

Qaderi, Mirwais M., et al. "The Biology of Canadian Weeds. 139. Rhamnus Cathartica L." Canadian Journal of Plant Science, vol. 89, no. 1, 2009, p. 169.