Philippines. National Statistical Coordination Board. (1992). Philippine standard occupational classification, 1992. National Statistical Coordination Board.
Cita Chicago (17th ed.)Philippines. National Statistical Coordination Board. Philippine Standard Occupational Classification, 1992. Makati, Metro Manila: National Statistical Coordination Board, 1992.
Cita MLA (9th ed.)Philippines. National Statistical Coordination Board. Philippine Standard Occupational Classification, 1992. National Statistical Coordination Board, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.