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. USA: Techmedia, 1998.

MLA (9th ed.) Citation

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