Dyfyniad APA
Summers, J. L., & Campbell, E. J. (2004). Dietary supplement labeling compliance review (3rd ed.). Blackwell Publishing Professional.
Dyfyniad Arddull Chicago
Summers, James L., and Elizabeth J. Campbell. Dietary Supplement Labeling Compliance Review. 3rd ed. Ames, Iowa: Blackwell Publishing Professional, 2004.
Dyfyniad MLA
Summers, James L., and Elizabeth J. Campbell. Dietary Supplement Labeling Compliance Review. 3rd ed. Blackwell Publishing Professional, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.