Eucken, W. (1951). This unsuccessful age: The pains of economic progress. London: William Hodge and Company, LTd.
استشهاد بنمط شيكاغوEucken, Walter. This Unsuccessful Age: The Pains of Economic Progress. London: William Hodge and Company, LTd, 1951.
MLA استشهادEucken, Walter. This Unsuccessful Age: The Pains of Economic Progress. London: William Hodge and Company, LTd, 1951.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.