Alexander, G. G. U. a. W. M. Innovations in Secondary Education. Holt, Rinehart and Winston.
Čikaški stil citiranja (17. izdanje)Alexander, Glenys G. Unruh and William M. Innovations in Secondary Education. Holt, Rinehart and Winston.
MLA način citiranja (8. izdanje)Alexander, Glenys G. Unruh and William M. Innovations in Secondary Education. Holt, Rinehart and Winston.
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