Dyfyniad APA

Gray, C. (1998). Secondhand smoke and cancer: Where's the proof?

Dyfyniad Arddull Chicago

Gray, C. Secondhand Smoke and Cancer: Where's the Proof? 1998.

Dyfyniad MLA

Gray, C. Secondhand Smoke and Cancer: Where's the Proof? 1998.

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