Vreeland, N., & Maday, B. C. (1977). Area handbook for Singapore. For sale by the Supt. of Docs., U.S. Govt. Print. Off..
芝加哥风格引文Vreeland, Nena, 与 Bela C. Maday. Area Handbook for Singapore. Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977.
MLA引文Vreeland, Nena, 与 Bela C. Maday. Area Handbook for Singapore. For sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977.
警告：这些引文格式不一定是100％准确.