DAVIS, T. A. (1967). Analytic geometry: A programmed text. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)DAVIS, Thomas A. Analytic Geometry: A Programmed Text. New York: McGraw-Hill, 1967.
Lua MLA (9ú heag.)DAVIS, Thomas A. Analytic Geometry: A Programmed Text. McGraw-Hill, 1967.
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