APA

Greenwood R. J., Sargeant A. B., Johnson D. H., Cowardin L. M. & Shaffer T. L. (1995). Factors associated with duck nest success in the prairie pothole region of Canada. Bethesda, Maryland, United States: The Wildlife Society.

Chicago

Greenwood Raymond J, Sargeant Alan B, Johnson Douglas H, Cowardin Lewis M and Shaffer Terry L. 1995. Factors associated with duck nest success in the prairie pothole region of Canada. Bethesda, Maryland, United States: The Wildlife Society.

Harvard

Greenwood R. J., Sargeant A. B., Johnson D. H., Cowardin L. M. and Shaffer T. L. (1995). Factors associated with duck nest success in the prairie pothole region of Canada. Bethesda, Maryland, United States: The Wildlife Society.

MLA

Greenwood Raymond J, Sargeant Alan B, Johnson Douglas H, Cowardin Lewis M and Shaffer Terry L. Factors associated with duck nest success in the prairie pothole region of Canada. Bethesda, Maryland, United States: The Wildlife Society. 1995.