Kaufman, P. E., Koehler, P. G., & Butler, J. F. (2006). External Parasites of Sheep and Goats. The University of Florida George A. Smathers Libraries.
Citazione stile Chigago Style (17a edizione)Kaufman, Phillip E., Philip G. Koehler, e Jerry F. Butler. External Parasites of Sheep and Goats. The University of Florida George A. Smathers Libraries, 2006.
Citatione MLA (9a ed.)Kaufman, Phillip E., et al. External Parasites of Sheep and Goats. The University of Florida George A. Smathers Libraries, 2006.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.