Purkey, W. W. (1970). Self concept and school achievement. Prentice Hall.
Chicago-čujuhus (17. p.)Purkey, William Watson. Self Concept and School Achievement. Prentice Hall, 1970.
MLA-čujuhus (9. p.)Purkey, William Watson. Self Concept and School Achievement. Prentice Hall, 1970.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.