Não informado. (1931). Investigational report. U.S. Department of Commerce, Bureau of Fisheries.
Chicago-Zitierstil (17. Ausg.)Não informado. Investigational Report. Washington: U.S. Department of Commerce, Bureau of Fisheries, 1931.
MLA-Zitierstil (8. Ausg.)Não informado. Investigational Report. U.S. Department of Commerce, Bureau of Fisheries, 1931.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.