Cherry, R. L. (1975). The Essay structure and purpose. Houghton Mifflin.
Cita Chicago (17th ed.)Cherry, Richard L. The Essay Structure and Purpose. Boston: Houghton Mifflin, 1975.
Cita MLA (9th ed.)Cherry, Richard L. The Essay Structure and Purpose. Houghton Mifflin, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.