APA (7th ed.) Citation

Harcourt, G. C., Karmel, P., & Wallace, R. (1967). Economic activity. Cambridge University Press.

Chicago Style (17th ed.) Citation

Harcourt, G. C., P.H Karmel, and R.H Wallace. Economic Activity. Cambridge: Cambridge University Press, 1967.

MLA (9th ed.) Citation

Harcourt, G. C., et al. Economic Activity. Cambridge University Press, 1967.