APA (7e ed.) Bronvermelding

Não informado. (1977). National Gallery Technical Bulletin. National Gallery.

Chicago (17e ed.) Bronvermelding

Não informado. National Gallery Technical Bulletin. London: National Gallery, 1977.

MLA (8e ed.) Bronvermelding

Não informado. National Gallery Technical Bulletin. National Gallery, 1977.

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