APA استشهاد

Boulding, K. (1970). Economics as a Science. McGraw-Hill.

استشهاد بنمط شيكاغو

Boulding, Kenneth. Economics as a Science. New York: McGraw-Hill, 1970.

MLA استشهاد

Boulding, Kenneth. Economics as a Science. McGraw-Hill, 1970.