APA (7th ed.) Citation

Blatt, B., & Kaplan, F. (1966). Christmas in purgatory: A photographic essay on mental retardation. Allyn and Bacon.

Chicago Style (17th ed.) Citation

Blatt, Burton, and Fred Kaplan. Christmas in Purgatory: A Photographic Essay on Mental Retardation. Boston, Massachusetts: Allyn and Bacon, 1966.

MLA (9th ed.) Citation

Blatt, Burton, and Fred Kaplan. Christmas in Purgatory: A Photographic Essay on Mental Retardation. Allyn and Bacon, 1966.