Smith, P. 1. (1971). Think tanks and problem solving. Business Books.
Trích dẫn kiểu ChicagoSmith, Paul 1.Slee. Think Tanks and Problem Solving. London: Business Books, 1971.
Trích dẫn MLASmith, Paul 1.Slee. Think Tanks and Problem Solving. Business Books, 1971.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.