The technique of clear writing.

MLA

Gunning, Robert. The Technique of Clear Writing. Revised edition New York: McGraw-Hill, 1968.

APA

Gunning, R. (1968). The technique of clear writing. Revised edition New York: McGraw-Hill.

Chicago

Gunning, Robert, The Technique of Clear Writing. Revised edition New York: McGraw-Hill, 1968.