APA引文

Grubel, H. G. (1977). International economics. Richard D. Irwin.

Chicago Style (17th ed.) Citation

Grubel, Herbert G. International Economics. Richard D. Irwin, 1977.

MLA引文

Grubel, Herbert G. International Economics. Richard D. Irwin, 1977.

警告：這些引文格式不一定是100％准確.