LIU, G. (2005). The Singapore foreign service: The first 40 years. Editions Didier Millet.
Cita Chicago (17th ed.)LIU, Gretchen. The Singapore Foreign Service: The First 40 Years. Editions Didier Millet, 2005.
Cita MLA (9th ed.)LIU, Gretchen. The Singapore Foreign Service: The First 40 Years. Editions Didier Millet, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.