APA (7e ed.) Bronvermelding

Ople, B. F. (1997). Manila Declaration. IN Horizons [column]: A social clause for global tourism. Manila Bulletin.

Chicago (17e ed.) Bronvermelding

Ople, Blas F. "Manila Declaration. IN Horizons [column]: A Social Clause for Global Tourism." Manila Bulletin 1997.

MLA (9e ed.) Bronvermelding

Ople, Blas F. "Manila Declaration. IN Horizons [column]: A Social Clause for Global Tourism." Manila Bulletin, 1997.