Dyfyniad APA
LANDO, H., & ET AL. (1999). SMOKELESS TOBACCO USE IN A POPULATION OF YOUNG ADULTS.
Dyfyniad Arddull Chicago
LANDO, H.A, and ET AL. SMOKELESS TOBACCO USE IN A POPULATION OF YOUNG ADULTS. 1999.
Dyfyniad MLA
LANDO, H.A, and ET AL. SMOKELESS TOBACCO USE IN A POPULATION OF YOUNG ADULTS. 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.