Gaya APA

Ulrich, W, M., Hayes, I, S. (1997). The Year 2000 ; Software Crisis Challenge Of The Century . New Jersey: YORDON PRESS.

Gaya MLA

Ulrich, William, M.., Hayes, Ian, S.. "The Year 2000 ; Software Crisis Challenge Of The Century". New Jersey: YORDON PRESS, 1997. Text.