APA

Williamson H., Hudson W. & Zinn C. (1975). Study of the relationships between various classes of road-surface roughness and human ratings of riding quality. Austin, TX: Texas University. Center for Highway Research.

Chicago

Williamson HJ, Hudson WR and Zinn CD. 1975. Study of the relationships between various classes of road-surface roughness and human ratings of riding quality. Austin, TX: Texas University. Center for Highway Research.

Harvard

Williamson H., Hudson W. and Zinn C. (1975). Study of the relationships between various classes of road-surface roughness and human ratings of riding quality. Austin, TX: Texas University. Center for Highway Research.

MLA

Williamson HJ, Hudson WR and Zinn CD. Study of the relationships between various classes of road-surface roughness and human ratings of riding quality. Austin, TX: Texas University. Center for Highway Research. 1975.