APA (7e ed.) Bronvermelding

Gatchalian, J. C. (1987). The nature, consequences and prospects of underground employment in the four major cities of Metro Manila. Institute of Industrial Relations, University of the Philippines.

Chicago (17e ed.) Bronvermelding

Gatchalian, Jose C. The Nature, Consequences and Prospects of Underground Employment in the Four Major Cities of Metro Manila. Quezon City: Institute of Industrial Relations, University of the Philippines, 1987.

MLA (9e ed.) Bronvermelding

Gatchalian, Jose C. The Nature, Consequences and Prospects of Underground Employment in the Four Major Cities of Metro Manila. Institute of Industrial Relations, University of the Philippines, 1987.