Dyfyniad APA

Steffen, R., DuPont, H. L., & Wilder-Smith, A. (2007). Manual of travel medicine and health (3rd ed.). BC Decker.

Dyfyniad Arddull Chicago

Steffen, Robert, Herbert L. DuPont, and Annelies Wilder-Smith. Manual of Travel Medicine and Health. 3rd ed. Hamilton, Ont.: BC Decker, 2007.

Dyfyniad MLA

Steffen, Robert, et al. Manual of Travel Medicine and Health. 3rd ed. BC Decker, 2007.

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