Benson, J. (1994). Gateways to algebra and geometry: An integrated approach (Teacher's ed.). McDougal, Littell & Co..
Lua i Stíl Chicago (17ú heag.)Benson, John. Gateways to Algebra and Geometry: An Integrated Approach. Teacher's ed. New York: McDougal, Littell & Co., 1994.
Lua MLA (9ú heag.)Benson, John. Gateways to Algebra and Geometry: An Integrated Approach. Teacher's ed. McDougal, Littell & Co., 1994.
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