Cita APA (7th ed.)

Angel, A. R. (2007). Elementary algebra for college students. Custom Publishing.

Cita Chicago (17th ed.)

Angel, Allen R. Elementary Algebra for College Students. New York: Custom Publishing, 2007.

Cita MLA (9th ed.)

Angel, Allen R. Elementary Algebra for College Students. Custom Publishing, 2007.

Atenció: Aquestes cites poden no estar 100% correctes.