APA (7th ed.) Citation

Held, G. (1989). DOS productivity tips and tricks. John Wiley & Sons.

Chicago Style (17th ed.) Citation

Held, Gilbert. DOS Productivity Tips and Tricks. New York: John Wiley & Sons, 1989.

MLA (9th ed.) Citation

Held, Gilbert. DOS Productivity Tips and Tricks. John Wiley & Sons, 1989.

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