Dyfyniad APA

Samuelson, P. A. (1967). Economics: An introductory nalysis/7e (7th ed.). Mc Graw Hill Book company.

Dyfyniad Arddull Chicago

Samuelson, Paul A. Economics: An Introductory Nalysis/7e. 7th ed. London: Mc Graw Hill Book company, 1967.

Dyfyniad MLA

Samuelson, Paul A. Economics: An Introductory Nalysis/7e. 7th ed. Mc Graw Hill Book company, 1967.

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