Hill, R. (1999). The turning of the tide. Severn House.
Chicago Style aipamenaHill, Reginald. The Turning of the Tide. Sutton: Severn House, 1999.
MLA aipamenaHill, Reginald. The Turning of the Tide. Severn House, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.