Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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