Tinbergen J. (1939). A Method and Its Application to Investment Activity (1939.). League of Nations.
استشهاد بنمط شيكاغوTinbergen J. A Method and Its Application to Investment Activity. 1939. Geneva: League of Nations, 1939.
MLA استشهادTinbergen J. A Method and Its Application to Investment Activity. 1939. League of Nations, 1939.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.