Dyfyniad APA

Hoffer, E. (1963). The ordeal of change. New York: Harper & Row.

Dyfyniad Arddull Chicago

Hoffer, Eric. The Ordeal of Change. New York: Harper & Row, 1963.

Dyfyniad MLA

Hoffer, Eric. The Ordeal of Change. New York: Harper & Row, 1963.

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