Spear, R. E. (1999). Seeing double: Two versions of Guercino's "Joseph and Potiphar's wife". Harn Museum of Art, University of Florida.
Chicago-Zitierstil (17. Ausg.)Spear, Richard E. Seeing Double: Two Versions of Guercino's "Joseph and Potiphar's Wife". Gainesville, Florida: Harn Museum of Art, University of Florida, 1999.
MLA-Zitierstil (9. Ausg.)Spear, Richard E. Seeing Double: Two Versions of Guercino's "Joseph and Potiphar's Wife". Harn Museum of Art, University of Florida, 1999.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.