Penn, I. (1980). Flowers: Photogr. by Irving Penn. Harmony Books.
Lua i Stíl Chicago (17ú heag.)Penn, Irving. Flowers: Photogr. by Irving Penn. New York, NY: Harmony Books, 1980.
Lua MLA (8ú heag.)Penn, Irving. Flowers: Photogr. by Irving Penn. Harmony Books, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.