Dyfyniad APA

(1961). 100 problems in environmental health: A collection of promising research problems. Washington: Kirby Lithograph.

Dyfyniad Arddull Chicago

100 Problems in Environmental Health: A Collection of Promising Research Problems. Washington: Kirby Lithograph, 1961.

Dyfyniad MLA

100 Problems in Environmental Health: A Collection of Promising Research Problems. Washington: Kirby Lithograph, 1961.

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