APA

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

Chicago

Gunning Robert, . 1968. The technique of clear writing. New York: McGraw-Hill.

Harvard

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

MLA

Gunning Robert, . The technique of clear writing. New York: McGraw-Hill. 1968.