Andreescu, T., & Dospinescu, G. (2008). Problems from the book. XYZ Press.
Cita Chicago (17th ed.)Andreescu, Titu, i Gabriel Dospinescu. Problems from the Book. Allen, TX: XYZ Press, 2008.
Cita MLA (8th ed.)Andreescu, Titu, i Gabriel Dospinescu. Problems from the Book. XYZ Press, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.