Elhmmali, M. M. (1998). Complementary use of bile acids and sterols as sewage pollution indicators. University of Bristol.
Chicago-referens (17:e uppl.)Elhmmali, Mohaned Mimoun. Complementary Use of Bile Acids and Sterols as Sewage Pollution Indicators. England: University of Bristol, 1998.
MLA-referens (8:e uppl.)Elhmmali, Mohaned Mimoun. Complementary Use of Bile Acids and Sterols as Sewage Pollution Indicators. University of Bristol, 1998.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.