Παραπομπή APA

Smiley, J. (2001). Learn to program visual basic- databases. Firewall media.

Παραπομπή Chicago Style

Smiley, John. Learn to Program Visual Basic- Databases. New Delhi: Firewall media, 2001.

Παραπομπή MLA

Smiley, John. Learn to Program Visual Basic- Databases. Firewall media, 2001.