International Tunnelling Association. (1986). Tunnelling and Underground Space Technology. Pergamon Press.
Citação do estilo Chicago (17ª ed.)International Tunnelling Association. Tunnelling and Underground Space Technology. Oxford, Inglaterra: Pergamon Press, 1986.
Citação MLA (8ª ed.)International Tunnelling Association. Tunnelling and Underground Space Technology. Pergamon Press, 1986.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.