Ople, B. F. (1997). Manila Declaration. IN Horizons [column]: A social clause for global tourism. Manila Bulletin.
Citación estilo ChicagoOple, Blas F. "Manila Declaration. IN Horizons [column]: A Social Clause for Global Tourism." Manila Bulletin 1997.
Cita MLAOple, Blas F. "Manila Declaration. IN Horizons [column]: A Social Clause for Global Tourism." Manila Bulletin, 1997.
Warning: These citations may not always be 100% accurate.