APA

Ross H., Walker K., . (1980). Crash tests of single post sign installations using subcompact automobiles. College Station, TX: Texas A&M University. Texas Transportation Institute.

Chicago

Ross HE,Jr, Walker KC, . 1980. Crash tests of single post sign installations using subcompact automobiles. College Station, TX: Texas A&M University. Texas Transportation Institute.

Harvard

Ross H., Walker K., . (1980). Crash tests of single post sign installations using subcompact automobiles. College Station, TX: Texas A&M University. Texas Transportation Institute.

MLA

Ross HE,Jr, Walker KC, . Crash tests of single post sign installations using subcompact automobiles. College Station, TX: Texas A&M University. Texas Transportation Institute. 1980.