APA-referens (7:e uppl.)

Levy, B. N., & Hubbard, . E. (1995). Graphing calculator keystroke guide to accompany the Hubbard/Robinson algebra series. D.C. Heath.

Chicago-referens (17:e uppl.)

Levy, Benjamin N., och Elaine Hubbard. Graphing Calculator Keystroke Guide to Accompany the Hubbard/Robinson Algebra Series. Lexington, Mass.: D.C. Heath, 1995.

MLA-referens (8:e uppl.)

Levy, Benjamin N., och Elaine Hubbard. Graphing Calculator Keystroke Guide to Accompany the Hubbard/Robinson Algebra Series. D.C. Heath, 1995.