APA (7th ed.) Citation

Lessenberry, D. D. (1952). 20th century typewriting (Sixth edition.). South-western Pub. Co..

Chicago Style (17th ed.) Citation

Lessenberry, D. D. 20th Century Typewriting. Sixth edition. Cincinnati: South-western Pub. Co., 1952.

MLA (9th ed.) Citation

Lessenberry, D. D. 20th Century Typewriting. Sixth edition. South-western Pub. Co., 1952.

Warning: These citations may not always be 100% accurate.