Cita APA (7th ed.)
Gustafson,R. David, & Frisk, P. R. (1986). College algebra (3rd ed.). Brookes/Cole.
Cita Chicago (17th ed.)
Gustafson,R. David, i Peter R. Frisk. College Algebra. 3rd ed. California: Brookes/Cole, 1986.
Cita MLA (9th ed.)
Gustafson,R. David, i Peter R. Frisk. College Algebra. 3rd ed. Brookes/Cole, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.