APA

Pfeiffer D. U., . (2002). Veterinary Epidemiology - An Introduction. London: University of London.

Chicago

Pfeiffer D U, . 2002. Veterinary Epidemiology - An Introduction. London: University of London.

Harvard

Pfeiffer D. U., . (2002). Veterinary Epidemiology - An Introduction. London: University of London.

MLA

Pfeiffer D U, . Veterinary Epidemiology - An Introduction. London: University of London. 2002.