Não informado. (1969). Memoirs of the Hourglass Cruises. Florida Department of Natural Resources, Marine Research Laboratory.
Chicago-Zitierstil (17. Ausg.)Não informado. Memoirs of the Hourglass Cruises. St. Petersburg, Fla: Florida Department of Natural Resources, Marine Research Laboratory, 1969.
MLA-Zitierstil (8. Ausg.)Não informado. Memoirs of the Hourglass Cruises. Florida Department of Natural Resources, Marine Research Laboratory, 1969.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.