APA ציטוט

.Grubel, H. G. (1981). International economics. R.D. Irwin.

Chicago Style (17th ed.) Citation

.Grubel, Herbert G. International Economics. Homewood, Ill.: R.D. Irwin, 1981.

ציטוט MLA

.Grubel, Herbert G. International Economics. R.D. Irwin, 1981.