Cita APA (7a ed.)

(2001). foF2 variations with R12 solar index: Rome. [s.l.].

Cita Chicago Style (17a ed.)

FoF2 Variations with R12 Solar Index: Rome. [s.l.]: [s.l.], 2001.

Cita MLA (9a ed.)

FoF2 Variations with R12 Solar Index: Rome. [s.l.], 2001.