Dyfyniad APA

Ulmer, M. (1965). Economics: Theory and Practice (2nd ed.). Houghton Mifflin.

Dyfyniad Arddull Chicago

Ulmer, Melville. Economics: Theory and Practice. 2nd ed. Boston: Houghton Mifflin, 1965.

Dyfyniad MLA

Ulmer, Melville. Economics: Theory and Practice. 2nd ed. Houghton Mifflin, 1965.

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