APA
National Building Research Organisation, . (1994). Proceedings of the national symposium landslide in Sri Lanka. Colombo: National Building Research Organisation.
Chicago
National Building Research Organisation, . 1994. Proceedings of the national symposium landslide in Sri Lanka. Colombo: National Building Research Organisation.
Harvard
National Building Research Organisation, . (1994). Proceedings of the national symposium landslide in Sri Lanka. Colombo: National Building Research Organisation.
MLA
National Building Research Organisation, . Proceedings of the national symposium landslide in Sri Lanka. Colombo: National Building Research Organisation. 1994.
