Dyfyniad APA

Boulding, K. (1970). Economics as a science. Mc Graw Hill.

Dyfyniad Arddull Chicago

Boulding, K. Economics as a Science. New york: Mc Graw Hill, 1970.

Dyfyniad MLA

Boulding, K. Economics as a Science. Mc Graw Hill, 1970.

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