Dyfyniad APA

Wallace, R. B. D. (1998). Public health & preventive medicine. Prentice- Hall International INC.

Dyfyniad Arddull Chicago

Wallace, Robert B. Doebbeling. Public Health & Preventive Medicine. USA: Prentice- Hall International INC, 1998.

Dyfyniad MLA

Wallace, Robert B. Doebbeling. Public Health & Preventive Medicine. Prentice- Hall International INC, 1998.

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