Cita APA (7a ed.)

Gheddo, P. (1973). Why is the third world poor ? Orbis Books.

Cita Chicago Style (17a ed.)

Gheddo, Piero. Why Is the Third World Poor ? Nueva York: Orbis Books, 1973.

Cita MLA (9a ed.)

Gheddo, Piero. Why Is the Third World Poor ? Orbis Books, 1973.