Smith, G. (1989). Coastal navigation: :a programmed learning course (Ed.3.). Adlard coles nautical.
Chicago Style aipamenaSmith, Gerry. Coastal Navigation: :a Programmed Learning Course. Ed.3. London: Adlard coles nautical, 1989.
MLA aipamenaSmith, Gerry. Coastal Navigation: :a Programmed Learning Course. Ed.3. Adlard coles nautical, 1989.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.