Belloc, H. (1924). Economics for Helen ([1st ed., 1st issue.].). J.W. Arrowsmith.
Dyfyniad Arddull ChicagoBelloc, Hilaire. Economics for Helen. [1st ed., 1st issue.]. London: J.W. Arrowsmith, 1924.
Dyfyniad MLABelloc, Hilaire. Economics for Helen. [1st ed., 1st issue.]. J.W. Arrowsmith, 1924.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.