Penson, H. (1933). The economics of business life. New York: Cambridge at the University Press.
Dyfyniad Arddull ChicagoPenson, Henry. The Economics of Business Life. New York: Cambridge at the University Press, 1933.
Dyfyniad MLAPenson, Henry. The Economics of Business Life. New York: Cambridge at the University Press, 1933.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.