APA-viite (7. p.)

Holmes, C. (1931). National gallery Trafalgar square illustrated guide (6a. ed.). Trustees.

Chicago-viite (17. p.)

Holmes, Charles. National Gallery Trafalgar Square Illustrated Guide. 6a. ed. Londres: Trustees, 1931.

MLA-viite (9. p.)

Holmes, Charles. National Gallery Trafalgar Square Illustrated Guide. 6a. ed. Trustees, 1931.