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.

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.

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.