(1991). Enhancing learning and thinking. Praeger.
Chicago-čujuhus (17. p.)Enhancing Learning and Thinking. New York: Praeger, 1991.
MLA-čujuhus (9. p.)Enhancing Learning and Thinking. Praeger, 1991.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.