Ontario. Dept. of Economics and Development Regional development ; selected background & Gertler, L. O. (1965). Regional development ; selected background papers for the Province of Ontario's International Conference on Regional Development and Economic Change, Feb. 15, 16, 17, Toronto, 1964. s.n.
Παραπομπή σε μορφή Chicago (17η εκδ.)Ontario. Dept. of Economics and Development Regional development ; selected background και Leonard O. Gertler. Regional Development ; Selected Background Papers for the Province of Ontario's International Conference on Regional Development and Economic Change, Feb. 15, 16, 17, Toronto, 1964. [Toronto: s.n, 1965.
Παραπομπή σε μορφή MLA (9th εκδ.)Ontario. Dept. of Economics and Development Regional development ; selected background και Leonard O. Gertler. Regional Development ; Selected Background Papers for the Province of Ontario's International Conference on Regional Development and Economic Change, Feb. 15, 16, 17, Toronto, 1964. s.n, 1965.