APA (7th ed.) Citation

Sandberg, M., Blomqvist, C., & Sjöberg, M. Warm Air Systems.

Chicago Style (17th ed.) Citation

Sandberg, Mats, Claes Blomqvist, and Mats Sjöberg. Warm Air Systems. Gävle.

MLA (9th ed.) Citation

Sandberg, Mats, et al. Warm Air Systems.