United States. Department of Education. Office of Communications and Outreach. (2005). Helping your child learn mathematics: With activities for children in preshool through grade 5 (Rev. [ed.].). U.S. Department of Education, Office of Communications and Outreach.
Citace podle Chicago (17th ed.)United States. Department of Education. Office of Communications and Outreach. Helping Your Child Learn Mathematics: With Activities for Children in Preshool Through Grade 5. Rev. [ed.]. Washington, D.C: U.S. Department of Education, Office of Communications and Outreach, 2005.
Citace podle MLA (9th ed.)United States. Department of Education. Office of Communications and Outreach. Helping Your Child Learn Mathematics: With Activities for Children in Preshool Through Grade 5. Rev. [ed.]. U.S. Department of Education, Office of Communications and Outreach, 2005.