Ifrim, C., & Stinnesbeck, W. (2007). Early Turonian ammonites from Vallecillo, north-eastern Mexico: Taxonomy, biostratigraphy and palaeobiogeographical significance. Cretaceous research, 28(4), .
Chicago Style (17th ed.) CitationIfrim, Christina, and Wolfgang Stinnesbeck. "Early Turonian Ammonites from Vallecillo, North-eastern Mexico: Taxonomy, Biostratigraphy and Palaeobiogeographical Significance." Cretaceous Research 28, no. 4 (2007).
MLA (9th ed.) CitationIfrim, Christina, and Wolfgang Stinnesbeck. "Early Turonian Ammonites from Vallecillo, North-eastern Mexico: Taxonomy, Biostratigraphy and Palaeobiogeographical Significance." Cretaceous Research, vol. 28, no. 4, 2007.
Warning: These citations may not always be 100% accurate.