APA (7th ed.) Citation

Brennan, M. L., Kemp, R., & Christley, R. M. (2008). Direct and indirect contacts between cattle farms in north-west England. Elsevier.

Chicago Style (17th ed.) Citation

Brennan, Marnie L., R. Kemp, and Robert M. Christley. Direct and Indirect Contacts Between Cattle Farms in North-west England. Elsevier, 2008.

MLA (9th ed.) Citation

Brennan, Marnie L., et al. Direct and Indirect Contacts Between Cattle Farms in North-west England. Elsevier, 2008.