APA (7th ed.) Citation

National Gallery (Londres) & Helston, M. (1989). Painting in Spain during the later eighteenth century: [exhibition]. National Gallery.

Chicago Style (17th ed.) Citation

National Gallery (Londres) and Michael Helston. Painting in Spain During the Later Eighteenth Century: [exhibition]. [London]: National Gallery, 1989.

MLA (9th ed.) Citation

National Gallery (Londres) and Michael Helston. Painting in Spain During the Later Eighteenth Century: [exhibition]. National Gallery, 1989.