APA
U.S. Congress. Hearings [92-9], . (1971). Highway safety, design and operations. Wet weather performance. Studded tires. Lack of uniform traffic laws. Washington: U.S. Congress. Hearings [92-9].
Chicago
U.S. Congress. Hearings [92-9], . 1971. Highway safety, design and operations. Wet weather performance. Studded tires. Lack of uniform traffic laws. Washington: U.S. Congress. Hearings [92-9].
Harvard
U.S. Congress. Hearings [92-9], . (1971). Highway safety, design and operations. Wet weather performance. Studded tires. Lack of uniform traffic laws. Washington: U.S. Congress. Hearings [92-9].
MLA
U.S. Congress. Hearings [92-9], . Highway safety, design and operations. Wet weather performance. Studded tires. Lack of uniform traffic laws. Washington: U.S. Congress. Hearings [92-9]. 1971.