ArtNet: Irving Penn: Sample work provided.
Irving Penn: List of Irving Penn's published books of photography
Irving Penn: Biography with sample photos of his work.
Notable Photographers - Irving Penn: Information from About.com.
Photo District News | Twentieth Anniversary | 20 Most Influential: Comments by Nicholas Nixon along with two of Penn's photographs.
Underfoot: Photographs by Irving Penn: Information on exhibit at the Philadelphia Museum of Art, July 10 - November 28, 2004.