Florida Dept. of Natural Resources Marine Research Laboratory. (1969). Memoirs of hourglass cruises v.1. Florida Dept. of Natural Resources Marine Research Laboratory.
Lua i Stíl Chicago (17ú heag.)Florida Dept. of Natural Resources Marine Research Laboratory. Memoirs of Hourglass Cruises V.1. St. Petersburg: Florida Dept. of Natural Resources Marine Research Laboratory, 1969.
Lua MLA (9ú heag.)Florida Dept. of Natural Resources Marine Research Laboratory. Memoirs of Hourglass Cruises V.1. Florida Dept. of Natural Resources Marine Research Laboratory, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.