Dyfyniad APA

Scutchfield, F. D., & Keck, C. W. (2009). Principles of public health practice (3rd ed.). Delmar, Cengage Learning.

Dyfyniad Arddull Chicago

Scutchfield, F. Douglas, and C. William Keck. Principles of Public Health Practice. 3rd ed. Clifton Park, NY: Delmar, Cengage Learning, 2009.

Dyfyniad MLA

Scutchfield, F. Douglas, and C. William Keck. Principles of Public Health Practice. 3rd ed. Delmar, Cengage Learning, 2009.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.