Willis, H. (1966). Structure, style, and usage: A guide to expository writing. Holt, Rinehart and Winston.
Cita Chicago (17th ed.)Willis, Hulon. Structure, Style, and Usage: A Guide to Expository Writing. New York: Holt, Rinehart and Winston, 1966.
Cita MLA (9th ed.)Willis, Hulon. Structure, Style, and Usage: A Guide to Expository Writing. Holt, Rinehart and Winston, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.