APA

Lyles R., . (1981). Comparison of signs and markings for passing/no-passing zones. Orono,ME: Maine University. Social Science Research Institute.

Chicago

Lyles RW, . 1981. Comparison of signs and markings for passing/no-passing zones. Orono,ME: Maine University. Social Science Research Institute.

Harvard

Lyles R., . (1981). Comparison of signs and markings for passing/no-passing zones. Orono,ME: Maine University. Social Science Research Institute.

MLA

Lyles RW, . Comparison of signs and markings for passing/no-passing zones. Orono,ME: Maine University. Social Science Research Institute. 1981.