APA
Hirsch T., Post E. & Hayes G. (1972). Vehicle crash test and evaluation of median barriers for Texas highways. College Station, TX: Texas A&M University. Texas Transportation Institute. RR nr 146-4.
Chicago
Hirsch TJ, Post ER and Hayes GG. 1972. Vehicle crash test and evaluation of median barriers for Texas highways. College Station, TX: Texas A&M University. Texas Transportation Institute. RR nr 146-4.
Harvard
Hirsch T., Post E. and Hayes G. (1972). Vehicle crash test and evaluation of median barriers for Texas highways. College Station, TX: Texas A&M University. Texas Transportation Institute. RR nr 146-4.
MLA
Hirsch TJ, Post ER and Hayes GG. Vehicle crash test and evaluation of median barriers for Texas highways. College Station, TX: Texas A&M University. Texas Transportation Institute. RR nr 146-4. 1972.