APA aipamena

Sagan, C. (1970). Planetary exploration. Oregon State System of Higher Education.

Chicago Style aipamena

Sagan, Carl. Planetary Exploration. Eugene, Oregon: Oregon State System of Higher Education, 1970.

MLA aipamena

Sagan, Carl. Planetary Exploration. Oregon State System of Higher Education, 1970.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.