Droayan, I. (1982). Introductory algebra: A guide worktext. John Wiley and Sons.
Cita Chicago (17th ed.)Droayan, Irving. Introductory Algebra: A Guide Worktext. John Wiley and Sons, 1982.
Cita MLA (9th ed.)Droayan, Irving. Introductory Algebra: A Guide Worktext. John Wiley and Sons, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.