Supplement to the Summary Catalogue : : National Gallery Catalogues.

MLA

Supplement to the Summary Catalogue : National Gallery Catalogues. London: Trustees of the National Gallery (Londen), 1972.

APA

(1972). Supplement to the Summary Catalogue : National Gallery Catalogues. London: Trustees of the National Gallery (Londen).

Chicago

Supplement to the Summary Catalogue: National Gallery Catalogues. London: Trustees of the National Gallery (Londen), 1972.