University of the Philippines (Diliman). Labor Education Center. (1955). [Handbook for trainees]. s.n.].
Cita Chicago (17th ed.)University of the Philippines (Diliman). Labor Education Center. [Handbook for Trainees]. [Manila: s.n.], 1955.
Cita MLA (9th ed.)University of the Philippines (Diliman). Labor Education Center. [Handbook for Trainees]. s.n.], 1955.
Atenció: Aquestes cites poden no estar 100% correctes.