Carabacan, B. N., Dulay, O. J. S., Oblena, A. J. Z., Samson, M. M. M., & Timbang, A. A. B. (2018). Project O.H.S (Operational policy, healthy workplace and standadized services). Department of environmental and Occupational Health, College of Public Health, University of the Philippines Manila.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিCarabacan, Balie N., Oliver James S. Dulay, Aaron Jairo Z. Oblena, Maria Margarita M. Samson, এবং Aileen A. Benitez Timbang. Project O.H.S (Operational Policy, Healthy Workplace and Standadized Services). Manila: Department of environmental and Occupational Health, College of Public Health, University of the Philippines Manila, 2018.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিCarabacan, Balie N., et al. Project O.H.S (Operational Policy, Healthy Workplace and Standadized Services). Department of environmental and Occupational Health, College of Public Health, University of the Philippines Manila, 2018.