Asphalt Institute. (1963). Asphalt for off-street paving and play areas (2nd ed.). Asphalt Institute.
Citazione stile Chigago Style (17a edizione)Asphalt Institute. Asphalt for Off-street Paving and Play Areas. 2nd ed. College Park, Md.: Asphalt Institute, 1963.
Citatione MLA (8a ed.)Asphalt Institute. Asphalt for Off-street Paving and Play Areas. 2nd ed. Asphalt Institute, 1963.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.