Dyfyniad APA

Sandford, C., & Vaish, M. B. (1971). Principles of economics. The Macmillan press limited.

Dyfyniad Arddull Chicago

Sandford, C.T, and M.C. Bradbury Vaish. Principles of Economics. London: The Macmillan press limited, 1971.

Dyfyniad MLA

Sandford, C.T, and M.C. Bradbury Vaish. Principles of Economics. The Macmillan press limited, 1971.

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