APA (7th ed.) Citation

Willis, M. B. (1991). The German shepherd dog: A genetic history. H.F.& G. Witherby Ltd.

Chicago Style (17th ed.) Citation

Willis, Malcolm B. The German Shepherd Dog: A Genetic History. Great Britain: H.F.& G. Witherby Ltd, 1991.

MLA (9th ed.) Citation

Willis, Malcolm B. The German Shepherd Dog: A Genetic History. H.F.& G. Witherby Ltd, 1991.