Edmonds, G. (1982). Road maintenance: Options for improvement. International Labour Office.
Citazione stile Chigago Style (17a edizione)Edmonds, G.A. Road Maintenance: Options for Improvement. Geneva: International Labour Office, 1982.
Citatione MLA (9a ed.)Edmonds, G.A. Road Maintenance: Options for Improvement. International Labour Office, 1982.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.