(1972). Master Index Vol. 51-60, 1971-1972 years. 1972.
Cita Chicago (17th ed.)Master Index Vol. 51-60, 1971-1972 Years. 1972, 1972.
Cita MLA (9th ed.)Master Index Vol. 51-60, 1971-1972 Years. 1972, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.