APA (7th ed.) Citation

Bull, L. B., Culvenor, C. C. J., & Dick, A. T. (1968). The pyrrolizidine alkaloids. North-Holland Publ. Comp.

Chicago Style (17th ed.) Citation

Bull, Lionel Batley, C. C. J. Culvenor, and A. T. Dick. The Pyrrolizidine Alkaloids. Amsterdam: North-Holland Publ. Comp, 1968.

MLA (9th ed.) Citation

Bull, Lionel Batley, et al. The Pyrrolizidine Alkaloids. North-Holland Publ. Comp, 1968.