Perschbacher,Ruth. (1993). Assesment: The Cornerstone of activity programs. State College: Venture Publishing.
Chicago Stili AlıntıPerschbacher,Ruth. Assesment: The Cornerstone of Activity Programs. State College: Venture Publishing, 1993.
MLA AlıntıPerschbacher,Ruth. Assesment: The Cornerstone of Activity Programs. State College: Venture Publishing, 1993.
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