APA

Legget R., . (1976). Underground of cities. Ottawa: National Research Council Canada. DBR paper nr 689 [Development and Utilization of Underground Space. Symposium. Kansas City 1975. Proceedings, s 125-33].

Chicago

Legget RF, . 1976. Underground of cities. Ottawa: National Research Council Canada. DBR paper nr 689 [Development and Utilization of Underground Space. Symposium. Kansas City 1975. Proceedings, s 125-33].

Harvard

Legget R., . (1976). Underground of cities. Ottawa: National Research Council Canada. DBR paper nr 689 [Development and Utilization of Underground Space. Symposium. Kansas City 1975. Proceedings, s 125-33].

MLA

Legget RF, . Underground of cities. Ottawa: National Research Council Canada. DBR paper nr 689 [Development and Utilization of Underground Space. Symposium. Kansas City 1975. Proceedings, s 125-33]. 1976.