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.