Martz, G., & Robinson, A. (2012). Cracking the new GMAT (Rev. & updated 2013 ed.). Random House.
Lua i Stíl Chicago (17ú heag.)Martz, Geoff, agus Adam Robinson. Cracking the New GMAT. Rev. & updated 2013 ed. New York: Random House, 2012.
Lua MLA (9ú heag.)Martz, Geoff, agus Adam Robinson. Cracking the New GMAT. Rev. & updated 2013 ed. Random House, 2012.
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