Cita APA (7th ed.)
Goodman, A., & Hirsch, L. (1986). Understanding elementary algebra: A course for college students. West.
Cita Chicago (17th ed.)
Goodman, Arthur, i Lewis Hirsch. Understanding Elementary Algebra: A Course for College Students. St. Paul: West, 1986.
Cita MLA (9th ed.)
Goodman, Arthur, i Lewis Hirsch. Understanding Elementary Algebra: A Course for College Students. West, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.