Cita APA (7th ed.)

Philippines Department of Tourism.National Capital Region. (1991). 1991 tourism situation report: NCR. Department of Tourism.

Cita Chicago (17th ed.)

Philippines Department of Tourism.National Capital Region. 1991 Tourism Situation Report: NCR. Manila: Department of Tourism, 1991.

Cita MLA (9th ed.)

Philippines Department of Tourism.National Capital Region. 1991 Tourism Situation Report: NCR. Department of Tourism, 1991.

Atenció: Aquestes cites poden no estar 100% correctes.