Stewart, Mark A . Peterson's master the GMAT 2012 / Mark A. Stewart. - Eighteenth edition - Lawrenceville, NJ : Peterson's, 2011. - 710 p. : ill. ; + 1 CD-ROM. ; 28 cm. ISBN: 978-0-7689-3143-3 0-7689-3143-6 Subjects--Topical Terms: Mathematics