Gaya APA

Officials, A, A, O, S, H, A, T. (1976). Guidelines for Skid Resistant Pavement Design . America: AASHTO.

Gaya MLA

Officials, American, Assosiation, Of, State, Highway, And, Transfortation. "Guidelines for Skid Resistant Pavement Design". America: AASHTO, 1976. Text.