APA

Sorensen J. A., Jenkins P. L., Emmelin M., Stenlund H., Weinehall L., Earle-Richardson G. B. & May J. J. (20110504). The social marketing of safety behaviors: a quasi-randomized controlled trial of tractor retrofitting incentives. : American journal of public health.

Chicago

Sorensen Julie A, Jenkins Paul L, Emmelin Maria, Stenlund Hans, Weinehall Lars, Earle-Richardson Giulia B and May John J. 20110504. The social marketing of safety behaviors: a quasi-randomized controlled trial of tractor retrofitting incentives. : American journal of public health.

Harvard

Sorensen J. A., Jenkins P. L., Emmelin M., Stenlund H., Weinehall L., Earle-Richardson G. B. and May J. J. (20110504). The social marketing of safety behaviors: a quasi-randomized controlled trial of tractor retrofitting incentives. : American journal of public health.

MLA

Sorensen Julie A, Jenkins Paul L, Emmelin Maria, Stenlund Hans, Weinehall Lars, Earle-Richardson Giulia B and May John J. The social marketing of safety behaviors: a quasi-randomized controlled trial of tractor retrofitting incentives. : American journal of public health. 20110504.