Dyfyniad APA

Gray, R., & Peterson, J. M. (1974). Economic development of the United States (Rev. ed.). R. D. Irwin.

Dyfyniad Arddull Chicago

Gray, Ralph, and John M. Peterson. Economic Development of the United States. Rev. ed. Homewood, Ill.: R. D. Irwin, 1974.

Dyfyniad MLA

Gray, Ralph, and John M. Peterson. Economic Development of the United States. Rev. ed. R. D. Irwin, 1974.

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