APA استشهاد

Johnson, H. G. (1971). Trade strategy for rich and poor nations. George allen & Unwin.

استشهاد بنمط شيكاغو

Johnson, Harry G. Trade Strategy for Rich and Poor Nations. London: George allen & Unwin, 1971.

MLA استشهاد

Johnson, Harry G. Trade Strategy for Rich and Poor Nations. George allen & Unwin, 1971.