APA

Whitcomb H., . (1965). Strictly for secretaries. New York: McGraw-HillBook Co.

Chicago

Whitcomb Helen, . 1965. Strictly for secretaries. New York: McGraw-HillBook Co.

Harvard

Whitcomb H., . (1965). Strictly for secretaries. New York: McGraw-HillBook Co.

MLA

Whitcomb Helen, . Strictly for secretaries. New York: McGraw-HillBook Co. 1965.