References

Vihma, S. (1990). Product form: a semiological approach. In S. Vihma (Ed.) Semantic visions in design: proceedings from the symposium on design research and semiology 17-18. 5. 1989 at University of Industrial Arts Helsinki UIAH. Helsinki: University of Industrial Arts Helsinki UIAH.
Yamaha Corporation of America (2006). Yamaha Corporation of America - Acoustics. Retrieved September 17, 2006 from http://yamaha.com/guitars/acoustics/0,,CTID%253D600013%2526CNTYP%253DPRODUCT,00.html.

Vihma, S. (1990). Product form: a semiological approach. In S. Vihma (Ed.) Semantic visions in design: proceedings from the symposium on design research and semiology 17-18. 5. 1989 at University of Industrial Arts Helsinki UIAH. Helsinki: University of Industrial Arts Helsinki UIAH.