Karplus, R., & Thier, H. (1967). A new look at elementary school science: Science curriculum improvement study. Rand McNally.
Čikaški stil citiranja (17. izdanje)Karplus, Robert, i H.D Thier. A New Look at Elementary School Science: Science Curriculum Improvement Study. Chicago: Rand McNally, 1967.
MLA način citiranja (9. izdanje)Karplus, Robert, i H.D Thier. A New Look at Elementary School Science: Science Curriculum Improvement Study. Rand McNally, 1967.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.