Mortenson, W. P., Krider, D. T., & Sampson, R. J. (1967). Understanding our economy: Analysis, issues, principles ([Teacher's ed.].). Houghton Mifflin.
Dyfyniad Arddull ChicagoMortenson, W. P., Donald T. Krider, and Roy J. Sampson. Understanding Our Economy: Analysis, Issues, Principles. [Teacher's ed.]. Boston: Houghton Mifflin, 1967.
Dyfyniad MLAMortenson, W. P., et al. Understanding Our Economy: Analysis, Issues, Principles. [Teacher's ed.]. Houghton Mifflin, 1967.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.