Cita APA

Harcourt, G., Karmel, P., & Wallace, R. H. (1968). Economic activity. Cambridge University Press.

Citación estilo Chicago

Harcourt, G.C, P.H Karmel, and R. H. Wallace. Economic Activity. London: Cambridge University Press, 1968.

Cita MLA

Harcourt, G.C, et al. Economic Activity. Cambridge University Press, 1968.