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1
Becoming a critical thinker / Vincent Ryan Ruggiero.
Boston : Houghton Mifflin, c1999.
vii, 136 p. : ill. ; 28 cm.
2
Contemporary business communication : from thought to expression / Joan Frantz Vesper, Vincent Ryan Ruggiero.
New York, NY : HarperCollins College Publishers, 1993
xxvi, 565 p. : ill. ; 23 cm.

Emphasizing creative, critical and ethical thinking, this text shows students how to apply those skills to effective business correspondence, challenging them - through case studies and exercise applications - to think about complex communication issues.
3
The art of thinking : a guide to critical and creative thought / Vincent Ryan Ruggiero.
New York : HarperCollins, 1991.
xx, 264 p. : ill. ; 24 cm