Goff, G. K., & Berg, M. E. (1968). Basic mathematics: A programmed introduction. Appleton-Century-Crofts.
Lua i Stíl Chicago (17ú heag.)Goff, Gerald K., agus Milton Edward Berg. Basic Mathematics: A Programmed Introduction. New York: Appleton-Century-Crofts, 1968.
Lua MLA (9ú heag.)Goff, Gerald K., agus Milton Edward Berg. Basic Mathematics: A Programmed Introduction. Appleton-Century-Crofts, 1968.
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