Cita APA

Ulrich, W. M., & Hayes, I. S. (1997). The year 2000 software crisis: Challenge of the century. Prentice Hall.

Citación estilo Chicago

Ulrich, William M., and Ian S. Hayes. The Year 2000 Software Crisis: Challenge of the Century. Upper Saddle River, NJ: Prentice Hall, 1997.

Cita MLA

Ulrich, William M., and Ian S. Hayes. The Year 2000 Software Crisis: Challenge of the Century. Prentice Hall, 1997.