Galenson,Walter, & Harviy Leibenstein. (1955). Investment Criteria, Productivity and Economic Development. Quarterly Journal of Eonomics.
Παραπομπή σε μορφή Chicago (17η εκδ.)Galenson,Walter, και Harviy Leibenstein. Investment Criteria, Productivity and Economic Development. New Jersey: Quarterly Journal of Eonomics, 1955.
Παραπομπή σε μορφή MLA (9th εκδ.)Galenson,Walter, και Harviy Leibenstein. Investment Criteria, Productivity and Economic Development. Quarterly Journal of Eonomics, 1955.