Catalogues Raisonnés

• MacDonald, Margaret F., James McNeill Whistler. Drawings, Pastels and Watercolours. A Catalogue Raisonné, New Haven and London, 1995 (cat. no. 1393) as 'The Little Blue Cap'.

Catalogues 1855-1905

• Œuvres de James McNeill Whistler, Palais de l'Ecole des Beaux-Arts, Paris, 1905 (cat. no. 93) as 'The little Blue Cap'.
• Aquarellen, Pastels, Teekingen, Etsen, Lithographien en een Schilderij door James McNeill Whistler, Museum Boijmans van Beuningen, Rotterdam, 1906 (cat. no. 5).

Websites

• Art Institute of Chicago website.
• Clarke, Jay A., and Sarah Kelly Oehler, eds., Whistler Paintings and Drawings at the Art Institute of Chicago, The Art Institute of Chicago, 2020, website (cat. no. 32).