Cita APA (7a ed.)

Alexander, I., & Beus-Dukic, L. (2009). Discovering requirements: How to specify products and services. Wiley.

Cita Chicago Style (17a ed.)

Alexander, Ian, y Ljerka Beus-Dukic. Discovering Requirements: How to Specify Products and Services. Chichester, West Sussex, England: Wiley, 2009.

Cita MLA (9a ed.)

Alexander, Ian, y Ljerka Beus-Dukic. Discovering Requirements: How to Specify Products and Services. Wiley, 2009.