Alexander, I., & Beus-Dukic, L. (2009). Discovering requirements: How to specify products and services. Wiley.
芝加哥风格引文Alexander, Ian, 与 Ljerka Beus-Dukic. Discovering Requirements: How to Specify Products and Services. Chichester, West Sussex, England: Wiley, 2009.
MLA引文Alexander, Ian, 与 Ljerka Beus-Dukic. Discovering Requirements: How to Specify Products and Services. Wiley, 2009.
警告：这些引文格式不一定是100％准确.