Dyfyniad APA

Lipsey, R. G., Steiner, P. O., & Purvis, D. D. (1984). Economics (Seventh edition.). Harper & Row.

Dyfyniad Arddull Chicago

Lipsey, Richard G., Peter Otto Steiner, and Douglas D. Purvis. Economics. Seventh edition. New York: Harper & Row, 1984.

Dyfyniad MLA

Lipsey, Richard G., et al. Economics. Seventh edition. Harper & Row, 1984.

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