APA (7th ed.) Citation

Penn, I., Keaney, M., & Hackford, T. R. (2010). Irving Penn portraits. National Portrait Gallery ; Distributed by Abrams in the U.S. and Canada.

Chicago Style (17th ed.) Citation

Penn, Irving, Magdalene Keaney, and Terry Reece Hackford. Irving Penn Portraits. London : [New York?]: National Portrait Gallery ; Distributed by Abrams in the U.S. and Canada, 2010.

MLA (9th ed.) Citation

Penn, Irving, et al. Irving Penn Portraits. National Portrait Gallery ; Distributed by Abrams in the U.S. and Canada, 2010.