APA (7e ed.) Bronvermelding

Gilbert, M. (1958). Comparative national products and price levels: A study of Western Europe and the United States. Organisation for European Economic Cooperation.

Chicago (17e ed.) Bronvermelding

Gilbert, Milton. Comparative National Products and Price Levels: A Study of Western Europe and the United States. Paris: Organisation for European Economic Cooperation, 1958.

MLA (9e ed.) Bronvermelding

Gilbert, Milton. Comparative National Products and Price Levels: A Study of Western Europe and the United States. Organisation for European Economic Cooperation, 1958.