Cita APA (7th ed.)

Martin, B., & Hanington, B. (2012). Universal methods of design: 100 ways to research complex problems, develop innovative ideas, and design effective solutions (1a. ed.). Rockport Publishers.

Cita Chicago (17th ed.)

Martin, Bella, i Bruce Hanington. Universal Methods of Design: 100 Ways to Research Complex Problems, Develop Innovative Ideas, and Design Effective Solutions. 1a. ed. Beverly Hills: Rockport Publishers, 2012.

Cita MLA (9th ed.)

Martin, Bella, i Bruce Hanington. Universal Methods of Design: 100 Ways to Research Complex Problems, Develop Innovative Ideas, and Design Effective Solutions. 1a. ed. Rockport Publishers, 2012.