Commerce Clearing House. (1960). Guidebook to labor relations. s.n.
Cita Chicago (17th ed.)Commerce Clearing House. Guidebook to Labor Relations. Chicago: s.n, 1960.
Cita MLA (9th ed.)Commerce Clearing House. Guidebook to Labor Relations. s.n, 1960.
Atenció: Aquestes cites poden no estar 100% correctes.