Smit, J. (1981). A catastrophic event at the cretaceous-tertiary boundary.
Chicago Style (17th ed.) CitationSmit, Jan. A Catastrophic Event at the Cretaceous-tertiary Boundary. 1981.
MLA (9th ed.) CitationSmit, Jan. A Catastrophic Event at the Cretaceous-tertiary Boundary. 1981.
Warning: These citations may not always be 100% accurate.