Graham. (2013). The Mathematics of Paul ErdÅ's I (2.). Springer New York.
Cita Chicago (17th ed.)Graham. The Mathematics of Paul ErdÅ's I. 2. Springer New York, 2013.
Cita MLA (8th ed.)Graham. The Mathematics of Paul ErdÅ's I. 2. Springer New York, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.