Macbeth, D. R. (1971). The extent to which pupils manipulate materials and attainment of process skills in elementary school science.
Čikaški stil citiranja (17. izdanje)Macbeth, Douglas Russell. The Extent to Which Pupils Manipulate Materials and Attainment of Process Skills in Elementary School Science. 1971.
MLA način citiranja (8. izdanje)Macbeth, Douglas Russell. The Extent to Which Pupils Manipulate Materials and Attainment of Process Skills in Elementary School Science. 1971.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.