Citazione APA

Vreeland, N., & Maday, B. C. (1977). Area handbook for Singapore (First edition.). U.S. Government Printing Office.

Stile di citazione Chicago

Vreeland, Nena, e Bela C. Maday. Area Handbook for Singapore. First edition. Washington, D.C.: U.S. Government Printing Office, 1977.

Citazione MLA

Vreeland, Nena, e Bela C. Maday. Area Handbook for Singapore. First edition. U.S. Government Printing Office, 1977.