Cita APA

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

Citación estilo Chicago

Harcourt,G C, y Karmel,P H. Economic Activity. Cambridge: Cambridge University Press, 1968.

Cita MLA

Harcourt,G C, y Karmel,P H. Economic Activity. Cambridge University Press, 1968.