Brockmann, S. (2000). The unsung hero. Ivy Books.
Cita Chicago (17th ed.)Brockmann, Suzanne. The Unsung Hero. New York: Ivy Books, 2000.
Cita MLA (8th ed.)Brockmann, Suzanne. The Unsung Hero. Ivy Books, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.