APA (7th ed.) Citation

Roberts, E., Ruschenberger, W. S. W., & Smithies, M. (2002). Two Yankee diplomats in 1830s Siam. Orchid Press.

Chicago Style (17th ed.) Citation

Roberts, Edmund, William Samuel Waithman Ruschenberger, and Michael Smithies. Two Yankee Diplomats in 1830s Siam. Bangkok: Orchid Press, 2002.

MLA (9th ed.) Citation

Roberts, Edmund, et al. Two Yankee Diplomats in 1830s Siam. Orchid Press, 2002.