APA (7th ed.) Citation

Ferro, L., Walz, S., & Greuter, S. (2014). Gamicards - An alternative method for paper-prototyping the design of gamified systems.

Chicago Style (17th ed.) Citation

Ferro, L., Steffen Walz, and S. Greuter. Gamicards - An Alternative Method for Paper-prototyping the Design of Gamified Systems. 2014.

MLA (9th ed.) Citation

Ferro, L., et al. Gamicards - An Alternative Method for Paper-prototyping the Design of Gamified Systems. 2014.