Παραπομπή APA

Engo, F. (1997). How to program Delphi-3. ZD Press.

Παραπομπή Chicago Style

Engo, Frank. How to Program Delphi-3. California: ZD Press, 1997.

Παραπομπή MLA

Engo, Frank. How to Program Delphi-3. ZD Press, 1997.