D'Angelo, John P. Mathematical thinking : problem-solving and proofs / John P. D'Angelo, Douglas B. West. - 2nd ed. - Upper Saddle River, NJ : Prentice Hall, c2000. - xx, 412 p. : ill. ; 24 cm. - 510 . Includes bibliographical references and index. ISBN: 0130144126 Subjects--Topical Terms: Mathematics.Problem solving. Dewey Class. No.: 510