APA

United States, . (19). Solar total energy project semiannual report. [Washington, D.C: .

Chicago

United States, . 19. Solar total energy project semiannual report. [Washington, D.C: .

Harvard

United States, . (19). Solar total energy project semiannual report. [Washington, D.C: .

MLA

United States, . Solar total energy project semiannual report. [Washington, D.C: . 19.