Dyfyniad APA

Meier, B. (1998). Memos show tobacco firms were obsessed with nicotine. Today.

Dyfyniad Arddull Chicago

Meier, Barry. "Memos Show Tobacco Firms Were Obsessed with Nicotine." Today 1998.

Dyfyniad MLA

Meier, Barry. "Memos Show Tobacco Firms Were Obsessed with Nicotine." Today, 1998.

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