NLC/USCM Library & Roney, R. G. (1970). The NLC/USCM Library classification system: Index for an urban studies collection. National League of Cities.
Цитирование в стиле Чикаго (17-е изд.)NLC/USCM Library и Raymond G. Roney. The NLC/USCM Library Classification System: Index for an Urban Studies Collection. Washington: National League of Cities, 1970.
Цитирование MLA (8-е изд.)NLC/USCM Library и Raymond G. Roney. The NLC/USCM Library Classification System: Index for an Urban Studies Collection. National League of Cities, 1970.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.