Dyfyniad APA

American Federation of Teachers. (1955). American teacher. American Federation of Teachers.

Dyfyniad Arddull Chicago

American Federation of Teachers. American Teacher. Chicago, Ill.: American Federation of Teachers, 1955.

Dyfyniad MLA

American Federation of Teachers. American Teacher. American Federation of Teachers, 1955.

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