Philippines. Department of Labor and Employment. (1990). Seminar-Workshop on the Prevention and Assistance Programs for Workers with Alcohol and other Drug-related Problems in the Workplace, November 7-9, 1990, Manila: Proceedings. Department of Labor and Employment.
Παραπομπή σε μορφή Chicago (17η εκδ.)Philippines. Department of Labor and Employment. Seminar-Workshop on the Prevention and Assistance Programs for Workers with Alcohol and Other Drug-related Problems in the Workplace, November 7-9, 1990, Manila: Proceedings. Manila: Department of Labor and Employment, 1990.
Παραπομπή σε μορφή MLA (9th εκδ.)Philippines. Department of Labor and Employment. Seminar-Workshop on the Prevention and Assistance Programs for Workers with Alcohol and Other Drug-related Problems in the Workplace, November 7-9, 1990, Manila: Proceedings. Department of Labor and Employment, 1990.