APA引文

Harcourt, G., & R H Wallace. (1967). Economic activity. Cambridge.

Chicago Edition Citation

Harcourt, G.C, and R H Wallace. Economic Activity. London: Cambridge, 1967.

MLA引文

Harcourt, G.C, and R H Wallace. Economic Activity. Cambridge, 1967.

警告：這些引文格式不一定是100％准確.