Philadelphia Museum of Art & Marcus, G. H. (1973). Treasures of the Philadelphia Museum of Art and the John G. Johnson Collection. [s.n.].
Chicago-viite (17. p.)Philadelphia Museum of Art ja George H. Marcus. Treasures of the Philadelphia Museum of Art and the John G. Johnson Collection. Philadelphia: [s.n.], 1973.
MLA-viite (8. p.)Philadelphia Museum of Art ja George H. Marcus. Treasures of the Philadelphia Museum of Art and the John G. Johnson Collection. [s.n.], 1973.
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