McCrimmon, J. M. (1972). Writing with a purpose (5th ed.). Houghton Mifflin.
Cita Chicago (17th ed.)McCrimmon, James M. Writing with a Purpose. 5th ed. Boston: Houghton Mifflin, 1972.
Cita MLA (9th ed.)McCrimmon, James M. Writing with a Purpose. 5th ed. Houghton Mifflin, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.