1.
Source Book of Gestalt Psychology
by Ellis, Willis D., Koffka, Kurt
ISBN: 9780939266302
List Price: $45.00
2.
Source Book of Gestalt Psychology - Willis D. Ellis - Hardcover
by Ellis, Willis D.
ISBN: 9780710061157
List Price: $31.75
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International Library of Psychology: A Source Book Of Gestalt Psychology
by Ellis Willis D
ISBN: 9780415209571
List Price: $435.00