APA aipamena

Sandstrom, G. E. (1963). History of tunnelling.

Chicago Style aipamena

Sandstrom, Gosta E. History of Tunnelling. 1963.

MLA aipamena

Sandstrom, Gosta E. History of Tunnelling. 1963.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.