APA (7e ed.) Bronvermelding

Não informado. (1949). Historic preservation. National Trust for Historic Preservation.

Chicago (17e ed.) Bronvermelding

Não informado. Historic Preservation. Washington: National Trust for Historic Preservation, 1949.

MLA (8e ed.) Bronvermelding

Não informado. Historic Preservation. National Trust for Historic Preservation, 1949.

Let op: Deze citaties zijn niet altijd 100% accuraat.