Frankenstein, C. (1979). They think again: Restoring cognitive abilities through teaching. Van Nostrand Reinhold.
Chicago-referens (17:e uppl.)Frankenstein, Carl. They Think Again: Restoring Cognitive Abilities Through Teaching. New York: Van Nostrand Reinhold, 1979.
MLA-referens (8:e uppl.)Frankenstein, Carl. They Think Again: Restoring Cognitive Abilities Through Teaching. Van Nostrand Reinhold, 1979.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.