APA aipamena

National Speleological Society. The Speleo digest. Pittsburgh Grotto Press.

Chicago Style aipamena

National Speleological Society. The Speleo Digest. Pittsburgh: Pittsburgh Grotto Press.

MLA aipamena

National Speleological Society. The Speleo Digest. Pittsburgh Grotto Press.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.