Dyfyniad APA

Sandford, C., & M.S Bradbury. (1971). Principles of economics. Macmillan Press.

Dyfyniad Arddull Chicago

Sandford, C.T, and M.S Bradbury. Principles of Economics. London: Macmillan Press, 1971.

Dyfyniad MLA

Sandford, C.T, and M.S Bradbury. Principles of Economics. Macmillan Press, 1971.

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