Parry, M., Anderson, T., & McGovern, U. (2003). Chambers compact book of facts. Chambers.
Cita Chicago (17th ed.)Parry, Melanie, Trevor Anderson, i Una McGovern. Chambers Compact Book of Facts. Edinburgh: Chambers, 2003.
Cita MLA (9th ed.)Parry, Melanie, et al. Chambers Compact Book of Facts. Chambers, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.