Cita APA (7th ed.)

Recco, W. (2002). 501 algebra questions. Learning Express.

Cita Chicago (17th ed.)

Recco, William. 501 Algebra Questions. New York: Learning Express, 2002.

Cita MLA (9th ed.)

Recco, William. 501 Algebra Questions. Learning Express, 2002.

Atenció: Aquestes cites poden no estar 100% correctes.