Dyfyniad APA

Woodward, A., & Laugesen, M. (2001). How many deaths are caused by second hand cigarette smoke? BMJ Group.

Dyfyniad Arddull Chicago

Woodward, A., and M. Laugesen. How Many Deaths Are Caused By Second Hand Cigarette Smoke? BMJ Group, 2001.

Dyfyniad MLA

Woodward, A., and M. Laugesen. How Many Deaths Are Caused By Second Hand Cigarette Smoke? BMJ Group, 2001.

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