APA-viite (7. p.)

Freddi, A., & Salmon, M. (2019). Design principles and methodologies: From conceptualization to first prototyping with examples and case studies. Springer International Publishing.

Chicago-viite (17. p.)

Freddi, Alessandro, ja Mario Salmon. Design Principles and Methodologies: From Conceptualization to First Prototyping with Examples and Case Studies. Cham [Germany]: Springer International Publishing, 2019.

MLA-viite (9. p.)

Freddi, Alessandro, ja Mario Salmon. Design Principles and Methodologies: From Conceptualization to First Prototyping with Examples and Case Studies. Springer International Publishing, 2019.