Dyfyniad APA

Fris, R. H. (2011). Epidemiology for public health practice: Student study guide (4th Edition.). Jones and Bartlett Publishers.

Dyfyniad Arddull Chicago

Fris, Robert H. Epidemiology for Public Health Practice: Student Study Guide. 4th Edition. United Kingdom: Jones and Bartlett Publishers, 2011.

Dyfyniad MLA

Fris, Robert H. Epidemiology for Public Health Practice: Student Study Guide. 4th Edition. Jones and Bartlett Publishers, 2011.

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