Gaya APA

BONO, E, D. (1991). SIX THINKING HATS FOR SCHOOLS 9 - 12 RESOURCE BOOK . NEW YORK: PERFECTION LEARNING.

Gaya MLA

BONO, EDWARD, DE. "SIX THINKING HATS FOR SCHOOLS 9 - 12 RESOURCE BOOK". NEW YORK: PERFECTION LEARNING, 1991. Text.