APA

United States, . (1977). Data source for the mean daily maximum temperature for the hottest month. [Washington, D.C: .

Chicago

United States, . 1977. Data source for the mean daily maximum temperature for the hottest month. [Washington, D.C: .

Harvard

United States, . (1977). Data source for the mean daily maximum temperature for the hottest month. [Washington, D.C: .

MLA

United States, . Data source for the mean daily maximum temperature for the hottest month. [Washington, D.C: . 1977.