lower left in graphite: 1st proof / Chas. White imp.; lower right in graphite: John Sloan; lower left in plate: THE GREEN HOUR-Angna Enters; lower right in plate: John Sloan '30
- Morse, Peter. John Sloan's Prints: A Catalogue Raisonné of the Etchings, Lithographs, and Posters. New Haven and London: Yale University Press, 1969, p. 271, no. 245, ii/ii.