Cita APA (7th ed.)

Sgroi, R. J., & Sgroi, L. S. (1993). Mathematics for elementary school teachers: Problem-solving investigations. PWS-Kent.

Cita Chicago (17th ed.)

Sgroi, Richard J., i Laura S. Sgroi. Mathematics for Elementary School Teachers: Problem-solving Investigations. Boston: PWS-Kent, 1993.

Cita MLA (9th ed.)

Sgroi, Richard J., i Laura S. Sgroi. Mathematics for Elementary School Teachers: Problem-solving Investigations. PWS-Kent, 1993.