APA-viite

Gurewich,, N., & Gurewich,, O. (1997). Teach yourself Visual basic 5 in twenty one days (4th.). Techmedia.

Chicago-tyylinen lähdeviittaus

Gurewich,, Nathan, ja Ori Gurewich. Teach Yourself Visual Basic 5 in Twenty One Days. 4th. New Delhi: Techmedia, 1997.

MLA-viite

Gurewich,, Nathan, ja Ori Gurewich. Teach Yourself Visual Basic 5 in Twenty One Days. 4th. Techmedia, 1997.