APA

Patten A. M., . (1980). Skill Typewriting. London: elbs.

Chicago

Patten Alfreda M, . 1980. Skill Typewriting. London: elbs.

Harvard

Patten A. M., . (1980). Skill Typewriting. London: elbs.

MLA

Patten Alfreda M, . Skill Typewriting. London: elbs. 1980.