Dyfyniad APA

(1998). Adolescents: Smoking and quitting How the physician can help. Pulsus Group Inc.

Dyfyniad Arddull Chicago

Adolescents: Smoking and Quitting How the Physician Can Help. Pulsus Group Inc, 1998.

Dyfyniad MLA

Adolescents: Smoking and Quitting How the Physician Can Help. Pulsus Group Inc, 1998.

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