Lovell, K. (1971). The growth of understanding in mathematics: Kindergarten through grade three. Holt.
Čikaški stil citiranja (17. izdanje)Lovell, K. The Growth of Understanding in Mathematics: Kindergarten Through Grade Three. New York: Holt, 1971.
MLA način citiranja (9. izdanje)Lovell, K. The Growth of Understanding in Mathematics: Kindergarten Through Grade Three. Holt, 1971.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.