Purkey, W. W. (1970). Self concept and school achievement. Prentice Hall.
Chicago Style (17. basım) AtıfPurkey, William Watson. Self Concept and School Achievement. Prentice Hall, 1970.
MLA (9th ed.) AtıfPurkey, William Watson. Self Concept and School Achievement. Prentice Hall, 1970.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..