Dyfyniad APA

Friedman, M., & Friedman, R. D. (1980). Free to choose: A personal statement. Harcourt Brace Jovanovich.

Dyfyniad Arddull Chicago

Friedman, Milton, and Rose D. Friedman. Free to Choose: A Personal Statement. New York: Harcourt Brace Jovanovich, 1980.

Dyfyniad MLA

Friedman, Milton, and Rose D. Friedman. Free to Choose: A Personal Statement. Harcourt Brace Jovanovich, 1980.

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