Cita APA (7th ed.)
Sobel, M. A., & Lerner, N. (1980). Algebra for college students: An intermediate approach. Prentice-Hall.
Cita Chicago (17th ed.)
Sobel, Max A., i Norbert Lerner. Algebra for College Students: An Intermediate Approach. Englewood Cliffs, N.J.: Prentice-Hall, 1980.
Cita MLA (9th ed.)
Sobel, Max A., i Norbert Lerner. Algebra for College Students: An Intermediate Approach. Prentice-Hall, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.