APA aipamena

Sperry Smith, S. (1997). Early childhood mathematics. Boston: Allyn and Bacon.

Chicago Style aipamena

Sperry Smith, Susan. Early Childhood Mathematics. Boston: Allyn and Bacon, 1997.

MLA aipamena

Sperry Smith, Susan. Early Childhood Mathematics. Boston: Allyn and Bacon, 1997.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.