Cita APA (7th ed.)
Wright, D. F., & Lindgren, K. E. (1973). Elementary functions; pre-calculus mathematics. Heath.
Cita Chicago (17th ed.)
Wright, D. Franklin, i Kenneth E. Lindgren. Elementary Functions; Pre-calculus Mathematics. Lexington, Mass.: Heath, 1973.
Cita MLA (9th ed.)
Wright, D. Franklin, i Kenneth E. Lindgren. Elementary Functions; Pre-calculus Mathematics. Heath, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.