Andreasson, F. (1999). Gastropod intrashell chemical profiles ([delta]¹⁸O, [delta]¹³C, Mg/Ca, Sr/Ca) as indicators of Paleogene and recent environmental and climatic conditions. Göteborg University, Earth Sciences Centre, Dept. of Oceanography.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Andreasson, Fredrik. Gastropod Intrashell Chemical Profiles ([delta]¹⁸O, [delta]¹³C, Mg/Ca, Sr/Ca) as Indicators of Paleogene and Recent Environmental and Climatic Conditions. Göteborg: Göteborg University, Earth Sciences Centre, Dept. of Oceanography, 1999.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Andreasson, Fredrik. Gastropod Intrashell Chemical Profiles ([delta]¹⁸O, [delta]¹³C, Mg/Ca, Sr/Ca) as Indicators of Paleogene and Recent Environmental and Climatic Conditions. Göteborg University, Earth Sciences Centre, Dept. of Oceanography, 1999.