APA

United States, . (1975). One hundred million dollars could be saved annually in postal operations in rural America without affecting quality of service, United States Postal Service. [Washington, D.C: .

Chicago

United States, . 1975. One hundred million dollars could be saved annually in postal operations in rural America without affecting quality of service, United States Postal Service. [Washington, D.C: .

Harvard

United States, . (1975). One hundred million dollars could be saved annually in postal operations in rural America without affecting quality of service, United States Postal Service. [Washington, D.C: .

MLA

United States, . One hundred million dollars could be saved annually in postal operations in rural America without affecting quality of service, United States Postal Service. [Washington, D.C: . 1975.