Cita APA

Van Til, L. D., Dohoo, I. R., Spangler, E., & Ogilvie, T. H. (1991). A survey of biological productivity of Prince Edward Island swine herds.

Citación estilo Chicago

Van Til, L D., I R. Dohoo, E. Spangler, y T H. Ogilvie. A Survey of Biological Productivity of Prince Edward Island Swine Herds. 1991.

Cita MLA

Van Til, L D., I R. Dohoo, E. Spangler, y T H. Ogilvie. A Survey of Biological Productivity of Prince Edward Island Swine Herds. 1991.