Cita APA (7th ed.)

Alter, S. (2002). Information systems: Foundation of e-business (4th ed.). Pearson Education International.

Cita Chicago (17th ed.)

Alter, Steven. Information Systems: Foundation of E-business. 4th ed. Upper Saddle River, N.J: Pearson Education International, 2002.

Cita MLA (9th ed.)

Alter, Steven. Information Systems: Foundation of E-business. 4th ed. Pearson Education International, 2002.