APA (7th ed.) Citation

Holmes, C. (1937). National Gallery Trafalgar Square illustrated guide (7th rev. ed.). Trustees of the National Gallery.

Chicago Style (17th ed.) Citation

Holmes, Charles. National Gallery Trafalgar Square Illustrated Guide. 7th rev. ed. London: Trustees of the National Gallery, 1937.

MLA (8th ed.) Citation

Holmes, Charles. National Gallery Trafalgar Square Illustrated Guide. 7th rev. ed. Trustees of the National Gallery, 1937.