Cita APA (7th ed.)
Rich,Barnet, & Schmidt,Philip A. (1993). Elementary algebra: Theory and problems (2nd ed.). McGraw-Hill.
Cita Chicago (17th ed.)
Rich,Barnet, i Schmidt,Philip A. Elementary Algebra: Theory and Problems. 2nd ed. New York: McGraw-Hill, 1993.
Cita MLA (9th ed.)
Rich,Barnet, i Schmidt,Philip A. Elementary Algebra: Theory and Problems. 2nd ed. McGraw-Hill, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.