APA (7th ed.) Zitazioa
Adair James. (1989). Problem solving: A top-down approach. Scott, Foresman and Co..
Chicago Style (17th ed.) Zitazioa
Adair James. Problem Solving: A Top-down Approach. Illinois: Scott, Foresman and Co., 1989.
MLA (9th ed.) Zitazioa
Adair James. Problem Solving: A Top-down Approach. Scott, Foresman and Co., 1989.
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