A Catalogue of the Sydney Collection at Frognal, Chislehurst, Kent. Sales cat., London, June 7, 1915, p. 2, no. 10 (ill.). [as “A bust Portrait of Eleonora Toledo”]
Richardson, E.P. "Costanza da Sommaia." Bulletin of the Detroit Institute of Arts 14, no. 7 (April 1935): 88–90, pp. 88–90 (ill.).
Berenson, Bernard. Pitture Italiane del Rinascimento. Milan, 1936, p. 98. [as "Bust of a Young Woman"]
Richardson, E.P., ed. The Detroit Institute of Arts, Catalogue of Paintings. Detroit, 1944, p. 18, no. 444. [dated about 1540]
Emiliani, Andrea. Il Bronzino. Busto Arsizio, 1960, p. 78. [doubted Bronzino attribution; dated ca. 1540]
Berenson, Bernard. Italian Pictures of the Renaissance: Florentine School, vol. 1. London, 1963, p. 41. [as by the studio of Bronzino]
Paintings in the Detroit Institute of Arts: A Checklist of the Paintings Acquired Before June 1965. Detroit, 1965, p. 18.
Matteoli, Anna. "La retrattistica del Bronzino nel 'Limbo.'" Commentari 20 (October–December 1969): 281-316, pp. 285–286, fig. 3 (ill.).
Fredericksen, Burton B. and Federico Zeri. Census of Pre-Nineteenth Century Italian Paintings in North American Public Collections. Cambridge, 1972, p. 36. [as "Portrait of Costanza da Sommaia?" by Bronzino]
Bacceschi, Edi. L'opera completa del Bronzino. Milan, 1973, p. 106, no. 131 (ill.).