Cita APA (7a ed.)

Harcourt, G. A. o. (1967). Economic activity. C.U.P.

Cita Chicago Style (17a ed.)

Harcourt, G.C. And others. Economic Activity. Cambridge: C.U.P, 1967.

Cita MLA (9a ed.)

Harcourt, G.C. And others. Economic Activity. C.U.P, 1967.