APA

National Asphalt Pavement Association. Information series nr 60, . (1977). Annual costs of pavements. Riverdale, MD: National Asphalt Pavement Association. Information series nr 60.

Chicago

National Asphalt Pavement Association. Information series nr 60, . 1977. Annual costs of pavements. Riverdale, MD: National Asphalt Pavement Association. Information series nr 60.

Harvard

National Asphalt Pavement Association. Information series nr 60, . (1977). Annual costs of pavements. Riverdale, MD: National Asphalt Pavement Association. Information series nr 60.

MLA

National Asphalt Pavement Association. Information series nr 60, . Annual costs of pavements. Riverdale, MD: National Asphalt Pavement Association. Information series nr 60. 1977.