APA

American Association of State Highway, and Transportation Officials A., . (2002). AASHTO provisional standards. Washington DC: American Association of State Highway.

Chicago

American Association of State Highway, and Transportation Officials AASHTO, . 2002. AASHTO provisional standards. Washington DC: American Association of State Highway.

Harvard

American Association of State Highway, and Transportation Officials A., . (2002). AASHTO provisional standards. Washington DC: American Association of State Highway.

MLA

American Association of State Highway, and Transportation Officials AASHTO, . AASHTO provisional standards. Washington DC: American Association of State Highway. 2002.