Foresman, S. (2000). Science: Student workbook, Grade K. Addison-Wesley Educational.
Chicago Style (17th ed.) ZitazioaForesman, Scott. Science: Student Workbook, Grade K. Glenview: Addison-Wesley Educational, 2000.
MLA (9th ed.) ZitazioaForesman, Scott. Science: Student Workbook, Grade K. Addison-Wesley Educational, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.