Isaac, N. B. (1999). Philippine General Hospital 89th anniversary. Manila Bulletin.
Cita Chicago (17th ed.)Isaac, Norman B. "Philippine General Hospital 89th Anniversary." Manila Bulletin 1999.
Cita MLA (9th ed.)Isaac, Norman B. "Philippine General Hospital 89th Anniversary." Manila Bulletin, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.