APA-referens (7:e uppl.)

Nicholas, S., & Haskell, B. (2009). Georgia O'Keeffe: Abstraction / Edited by Barbara Haskell With essays by Barbara Haskell And contributions by Sasha Nicholas. Yale Univ. Press [u.a.].

Chicago-referens (17:e uppl.)

Nicholas, Sasha, och Barbara Haskell. Georgia O'Keeffe: Abstraction / Edited by Barbara Haskell With Essays by Barbara Haskell And Contributions by Sasha Nicholas. New Haven [u.a.]: Yale Univ. Press [u.a.], 2009.

MLA-referens (8:e uppl.)

Nicholas, Sasha, och Barbara Haskell. Georgia O'Keeffe: Abstraction / Edited by Barbara Haskell With Essays by Barbara Haskell And Contributions by Sasha Nicholas. Yale Univ. Press [u.a.], 2009.