APA (7e ed.) Bronvermelding

Philippines (Republic) Dept. of Tourism & Philippines (Republic). Department of Tourism. Tourism: Four-year development plan, 1974 to 1977. [s.n.

Chicago (17e ed.) Bronvermelding

Philippines (Republic) Dept. of Tourism en Philippines (Republic). Department of Tourism. Tourism: Four-year Development Plan, 1974 to 1977. Manila: [s.n.

MLA (9e ed.) Bronvermelding

Philippines (Republic) Dept. of Tourism en Philippines (Republic). Department of Tourism. Tourism: Four-year Development Plan, 1974 to 1977. [s.n.