Velleman, Daniel J. How to prove it a structured approach / [electronic resource] : Daniel J. Velleman. - 2nd ed. - New York : Cambridge University Press, 2006. - 1 online resource (xii, 384 p.) : ill. Includes bibliographical references and index. ISBN: Source: CL0500000195 Safari Books Online Subjects--Topical Terms: Logic, Symbolic and mathematical.Mathematics. Index Terms--Genre/Form: Electronic books.