Παραπομπή APA

Gurewich,Nathan, & Gurewich,Ori. (1996). Teach yourself Visual Basic 4 in 21 days. Prentice-Hall of India.

Παραπομπή Chicago Style

Gurewich,Nathan, και Gurewich,Ori. Teach Yourself Visual Basic 4 in 21 Days. New Delhi: Prentice-Hall of India, 1996.

Παραπομπή MLA

Gurewich,Nathan, και Gurewich,Ori. Teach Yourself Visual Basic 4 in 21 Days. Prentice-Hall of India, 1996.