APA (7th ed.) Citation

Perry, G. (1998). Sams teach yourself: Visual basic 6 in 21 days. Techmedia.

Chicago Style (17th ed.) Citation

Perry, Greg. Sams Teach Yourself: Visual Basic 6 in 21 Days. New Delhi: Techmedia, 1998.

MLA (9th ed.) Citation

Perry, Greg. Sams Teach Yourself: Visual Basic 6 in 21 Days. Techmedia, 1998.