APA

Clarke M. L., Harvey D. & Humphreys D. (1981). Veterinary toxicology. London: Bailliere tindall.

Chicago

Clarke Myra L, Harvey D.G and Humphreys D.J. 1981. Veterinary toxicology. London: Bailliere tindall.

Harvard

Clarke M. L., Harvey D. and Humphreys D. (1981). Veterinary toxicology. London: Bailliere tindall.

MLA

Clarke Myra L, Harvey D.G and Humphreys D.J. Veterinary toxicology. London: Bailliere tindall. 1981.