Dyfyniad APA

Sickle, J. V. V. (1968). Introduction to economics. D Van Nostrand company.

Dyfyniad Arddull Chicago

Sickle, John V. Van. Introduction to Economics. New Jersey: D Van Nostrand company, 1968.

Dyfyniad MLA

Sickle, John V. Van. Introduction to Economics. D Van Nostrand company, 1968.

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