APA (7th ed.) Citation

Perry, G. (1998). Visual Basic 6 in 21 days. Sams Publishers.

Chicago Style (17th ed.) Citation

Perry, Greg. Visual Basic 6 in 21 Days. United States: Sams Publishers, 1998.

MLA (9th ed.) Citation

Perry, Greg. Visual Basic 6 in 21 Days. Sams Publishers, 1998.

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