Boevé-Jones, G. P. (2010). Come on, now buy a Beckmann too!: Portrait of the Lütjens famlily in Museum Boijmans Van Beuningen / authors: Gwendolyn P. Boevé-Jones.
Chicago-referens (17:e uppl.)Boevé-Jones, Gwendolyn P. Come on, Now Buy a Beckmann Too!: Portrait of the Lütjens Famlily in Museum Boijmans Van Beuningen / Authors: Gwendolyn P. Boevé-Jones. Rotterdam, 2010.
MLA-referens (8:e uppl.)Boevé-Jones, Gwendolyn P. Come on, Now Buy a Beckmann Too!: Portrait of the Lütjens Famlily in Museum Boijmans Van Beuningen / Authors: Gwendolyn P. Boevé-Jones. 2010.
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