Dyfyniad APA
ebrary, Inc, Ericsson, C. D., DuPont, H. L., & Steffen, R. (2008). Travelers' diarrhea (2nd ed.). BC Decker.
Dyfyniad Arddull Chicago
ebrary, Inc, Charles D. Ericsson, Herbert L. DuPont, and Robert Steffen. Travelers' Diarrhea. 2nd ed. Hamilton, Ont. ; Lewiston, NY: BC Decker, 2008.
Dyfyniad MLA
ebrary, Inc, et al. Travelers' Diarrhea. 2nd ed. BC Decker, 2008.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.