Cita APA (7th ed.)
Gheddo, P. (1973). Why is the third world poor? Orbis Books.
Cita Chicago (17th ed.)
Gheddo, Piero. Why Is the Third World Poor? New York: Orbis Books, 1973.
Cita MLA (9th ed.)
Gheddo, Piero. Why Is the Third World Poor? Orbis Books, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.