APA引文

Welfling, W., & Vaish, M. C. Principles of economics.

Chicago Edition Citation

Welfling, Weldon, and M. C. Vaish. Principles of Economics. :.

MLA引文

Welfling, Weldon, and M. C. Vaish. Principles of Economics.

警告：這些引文格式不一定是100％准確.