Gaya APA

Gutierrez, G., Barr, R, R. (1983). Power of the Poor in History, The . Maryknoll, New York, USA: Orbis Books.

Gaya MLA

Gutierrez, Gustavo., Barr, Robert, R.. "Power of the Poor in History, The". Maryknoll, New York, USA: Orbis Books, 1983. Academic.