APA

Zinsser W. K., . (1980). On writing well: an informal guide to writing nonfiction. New York: Harper and Row.

Chicago

Zinsser William Knowlton, . 1980. On writing well: an informal guide to writing nonfiction. New York: Harper and Row.

Harvard

Zinsser W. K., . (1980). On writing well: an informal guide to writing nonfiction. New York: Harper and Row.

MLA

Zinsser William Knowlton, . On writing well: an informal guide to writing nonfiction. New York: Harper and Row. 1980.