Heyman, K. (1983). The world's family. Putnam.
Cita Chicago Style (17a ed.)Heyman, Ken. The World's Family. New York: Putnam, 1983.
Cita MLA (8a ed.)Heyman, Ken. The World's Family. Putnam, 1983.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.