APA

Lenz K., . (1977). Traffic flow on roads outside built-up areas related to design elements and changes due to speed limits. : Geometric road design standards. Proceedings [OECD].

Chicago

Lenz KH, . 1977. Traffic flow on roads outside built-up areas related to design elements and changes due to speed limits. : Geometric road design standards. Proceedings [OECD].

Harvard

Lenz K., . (1977). Traffic flow on roads outside built-up areas related to design elements and changes due to speed limits. : Geometric road design standards. Proceedings [OECD].

MLA

Lenz KH, . Traffic flow on roads outside built-up areas related to design elements and changes due to speed limits. : Geometric road design standards. Proceedings [OECD]. 1977.