APA Style

Helmutt, E., Volker, R. (1994). Windows 3.0 and 3.1 (1 st ed 1994). Delhi: A.I.T.B.S.pub.

MLA Style

Helmutt, Erlenkotter., Volker, Reher. "Windows 3.0 and 3.1". 1 st ed 1994 Delhi: A.I.T.B.S.pub, 1994. Text.