(1991). John Heartfield.
Cita Chicago (17th ed.)John Heartfield. Köln, 1991.
Cita MLA (8th ed.)John Heartfield. 1991.
Atenció: Aquestes cites poden no estar 100% correctes.
(1991). John Heartfield.
Cita Chicago (17th ed.)John Heartfield. Köln, 1991.
Cita MLA (8th ed.)John Heartfield. 1991.