APA (7th ed.) Citation

Beecher, H. (1989). A DOS Primer for Librarians.

Chicago Style (17th ed.) Citation

Beecher, Henry. A DOS Primer for Librarians. 1989.

MLA (9th ed.) Citation

Beecher, Henry. A DOS Primer for Librarians. 1989.

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