Gaya APA

Hatfield, L, L., Lester, T, J. (1994). Development of investigating mathematics : student reseource book . New York: Glencone, McGraw-Hill.

Gaya MLA

Hatfield, Larry, L.., Lester, Thomas, J.. "Development of investigating mathematics : student reseource book". New York: Glencone, McGraw-Hill, 1994. Text.