Cita APA (7th ed.)

Hirsch, L., & Goodman, A. (1998). Understanding intermediate algebra: A course for college students (4th ed.). Brooks/Cole.

Cita Chicago (17th ed.)

Hirsch, Lewis, i Arthur Goodman. Understanding Intermediate Algebra: A Course for College Students. 4th ed. Pacific Grove, CA: Brooks/Cole, 1998.

Cita MLA (9th ed.)

Hirsch, Lewis, i Arthur Goodman. Understanding Intermediate Algebra: A Course for College Students. 4th ed. Brooks/Cole, 1998.