Παραπομπή APA

Leon, A., & Thomas, G. (1997). IBM mainframe and year 2000 solutions. -4th ed. , (4th ed. ,.). Comdex computer publishing.

Παραπομπή Chicago Style

Leon, Alexis, και Gibu Thomas. IBM Mainframe and Year 2000 Solutions. -4th Ed. ,. 4th ed. ,. New Delhi: Comdex computer publishing, 1997.

Παραπομπή MLA

Leon, Alexis, και Gibu Thomas. IBM Mainframe and Year 2000 Solutions. -4th Ed. ,. 4th ed. ,. Comdex computer publishing, 1997.