APA

Flesch R. F., Lass A. H., . (1989). A new guide to better writing. New York: Warner Communications.

Chicago

Flesch Rudolf Franz, Lass A H, . 1989. A new guide to better writing. New York: Warner Communications.

Harvard

Flesch R. F., Lass A. H., . (1989). A new guide to better writing. New York: Warner Communications.

MLA

Flesch Rudolf Franz, Lass A H, . A new guide to better writing. New York: Warner Communications. 1989.