APA

Krukar M., Cook J., . (1972). Studded tire pavement wear reduction and repair. Washington: Washington State Highway Department, research program, report 9.1 and 9.2.

Chicago

Krukar M, Cook JC, . 1972. Studded tire pavement wear reduction and repair. Washington: Washington State Highway Department, research program, report 9.1 and 9.2.

Harvard

Krukar M., Cook J., . (1972). Studded tire pavement wear reduction and repair. Washington: Washington State Highway Department, research program, report 9.1 and 9.2.

MLA

Krukar M, Cook JC, . Studded tire pavement wear reduction and repair. Washington: Washington State Highway Department, research program, report 9.1 and 9.2. 1972.