Recco, W. (2002). 501 algebra questions. Learning Express.
Chicago-čujuhus (17. p.)Recco, William. 501 Algebra Questions. New York: Learning Express, 2002.
MLA-čujuhus (9. p.)Recco, William. 501 Algebra Questions. Learning Express, 2002.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.