APA aipamena

(1990). The Soviet Union: A systematic geography. London: Hodder and Houghton.

Chicago Style aipamena

The Soviet Union: A Systematic Geography. London: Hodder and Houghton, 1990.

MLA aipamena

The Soviet Union: A Systematic Geography. London: Hodder and Houghton, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.