Cita APA (7th ed.)

Richberg, D. R. (1957). Labor union monopoly: A clear and present danger / by Donald R. Richberg (2. print.). Regnery.

Cita Chicago (17th ed.)

Richberg, Donald Randall. Labor Union Monopoly: A Clear and Present Danger / by Donald R. Richberg. 2. print. Chicago: Regnery, 1957.

Cita MLA (8th ed.)

Richberg, Donald Randall. Labor Union Monopoly: A Clear and Present Danger / by Donald R. Richberg. 2. print. Regnery, 1957.