Wiesner, D. (1988). Free fall. HarperCollins.
Cita Chicago (17th ed.)Wiesner, David. Free Fall. New York: HarperCollins, 1988.
Cita MLA (9th ed.)Wiesner, David. Free Fall. HarperCollins, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.
Wiesner, D. (1988). Free fall. HarperCollins.
Cita Chicago (17th ed.)Wiesner, David. Free Fall. New York: HarperCollins, 1988.
Cita MLA (9th ed.)Wiesner, David. Free Fall. HarperCollins, 1988.