Ona, E. T. (1986). The hospitals: 75 years of the University of The Philippines-Philippine General Hospital Medical Center (1910-1985). s.n.
Citazione stile Chigago Style (17a edizione)Ona, Enrique T. The Hospitals: 75 Years of the University of The Philippines-Philippine General Hospital Medical Center (1910-1985). Manila: s.n, 1986.
Citatione MLA (9a ed.)Ona, Enrique T. The Hospitals: 75 Years of the University of The Philippines-Philippine General Hospital Medical Center (1910-1985). s.n, 1986.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.