APA aipamena

(1973). Water resources in England and Wales [peta]. London : HMSO.

Chicago Style aipamena

Water Resources in England and Wales [peta]. London : HMSO, 1973.

MLA aipamena

Water Resources in England and Wales [peta]. London : HMSO, 1973.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.