APA

United States, . (1980). Change to service C weather schedules. [Washington, D.C: .

Chicago

United States, . 1980. Change to service C weather schedules. [Washington, D.C: .

Harvard

United States, . (1980). Change to service C weather schedules. [Washington, D.C: .

MLA

United States, . Change to service C weather schedules. [Washington, D.C: . 1980.