Vessel, M. F. (1963). Elementary school science teaching. Center for Applied Research in Education.
Čikaški stil citiranja (17. izdanje)Vessel, Matthew F. Elementary School Science Teaching. Washington: Center for Applied Research in Education, 1963.
MLA način citiranja (8. izdanje)Vessel, Matthew F. Elementary School Science Teaching. Center for Applied Research in Education, 1963.
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