Philadelphia Museum of Art. (1976). Philadelphia, three centuries of american art: Bicentennial exhibition, april 11-october 10, 1976. Philadelphia Museum of Art.
Chicago-viite (17. p.)Philadelphia Museum of Art. Philadelphia, Three Centuries of American Art: Bicentennial Exhibition, April 11-october 10, 1976. Philadelphia: Philadelphia Museum of Art, 1976.
MLA-viite (9. p.)Philadelphia Museum of Art. Philadelphia, Three Centuries of American Art: Bicentennial Exhibition, April 11-october 10, 1976. Philadelphia Museum of Art, 1976.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.