APA (7th ed.) Citation

Spolsky, J., & Holub, A. I. (2001). User interface design for programmers. Apress.

Chicago Style (17th ed.) Citation

Spolsky, Joel, and Allen I. Holub. User Interface Design for Programmers. Berkeley, Calif: Apress, 2001.

MLA (9th ed.) Citation

Spolsky, Joel, and Allen I. Holub. User Interface Design for Programmers. Apress, 2001.