APA (7th ed.) Citation

Simms, P., & Simms, S. (1999). The kingdoms of Laos: Six hundred years of history. Curzon.

Chicago Style (17th ed.) Citation

Simms, Peter, and Sanda Simms. The Kingdoms of Laos: Six Hundred Years of History. Richmond, Surrey: Curzon, 1999.

MLA (9th ed.) Citation

Simms, Peter, and Sanda Simms. The Kingdoms of Laos: Six Hundred Years of History. Curzon, 1999.