Coppens, C. (1886). A practical introduction to English rhetoric: Precepts and exercises. Schwartz, Kirwin & Fauss.
Chicago-referens (17:e uppl.)Coppens, Charles. A Practical Introduction to English Rhetoric: Precepts and Exercises. New York: Schwartz, Kirwin & Fauss, 1886.
MLA-referens (8:e uppl.)Coppens, Charles. A Practical Introduction to English Rhetoric: Precepts and Exercises. Schwartz, Kirwin & Fauss, 1886.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.