(1969). Solar-Geophysical data. U.S. Department of Commerce.
Chicago Style aipamenaSolar-Geophysical Data. Washington, D.C: U.S. Department of Commerce, 1969.
MLA aipamenaSolar-Geophysical Data. U.S. Department of Commerce, 1969.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.