Dyfyniad APA

Schumpeter, J. A. (1939). Business cycles. Mcgraw hill book company.

Dyfyniad Arddull Chicago

Schumpeter, Joseph A. Business Cycles. London: Mcgraw hill book company, 1939.

Dyfyniad MLA

Schumpeter, Joseph A. Business Cycles. Mcgraw hill book company, 1939.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.