Ellsworth, B. (2001). English simplified: Grammar, punctuation and mechanics, paragraphs and essays, research writing and documentation, ESL tips (9. ed.). Addison Wesley.
Chicago-Zitierstil (17. Ausg.)Ellsworth, Blanche. English Simplified: Grammar, Punctuation and Mechanics, Paragraphs and Essays, Research Writing and Documentation, ESL Tips. 9. ed. Reading, Mass.: Addison Wesley, 2001.
MLA-Zitierstil (9. Ausg.)Ellsworth, Blanche. English Simplified: Grammar, Punctuation and Mechanics, Paragraphs and Essays, Research Writing and Documentation, ESL Tips. 9. ed. Addison Wesley, 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.