APA

AASHTO HDG, . (1979). Highway drainage guidelines. Guidelines I-VI. Washington DC: American Association of State Highway and Transportation Officials.

Chicago

AASHTO HDG, . 1979. Highway drainage guidelines. Guidelines I-VI. Washington DC: American Association of State Highway and Transportation Officials.

Harvard

AASHTO HDG, . (1979). Highway drainage guidelines. Guidelines I-VI. Washington DC: American Association of State Highway and Transportation Officials.

MLA

AASHTO HDG, . Highway drainage guidelines. Guidelines I-VI. Washington DC: American Association of State Highway and Transportation Officials. 1979.