APA-viite (7. p.)
(1994). The Sitwells and the arts of the 1920s and 1930s. National portrait Gallery.
Chicago-viite (17. p.)
The Sitwells and the Arts of the 1920s and 1930s. London: National portrait Gallery, 1994.
MLA-viite (9. p.)
The Sitwells and the Arts of the 1920s and 1930s. National portrait Gallery, 1994.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.