Cita APA (7a ed.)

Vreeland, N., & Maday, B. C. (1977). Area handbook for Singapore. For sale by the Supt. of Docs., U.S. Govt. Print. Off..

Cita Chicago Style (17a ed.)

Vreeland, Nena, y Bela C. Maday. Area Handbook for Singapore. Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977.

Cita MLA (8a ed.)

Vreeland, Nena, y Bela C. Maday. Area Handbook for Singapore. For sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977.