Clausen, R. T. (1959). Sedum of the trans-Mexican volcanic belt: An exposition of taxonomic methods. Comstock Pub. Associates.
Chicago Style (17th ed.) CitationClausen, Robert Theodore. Sedum of the Trans-Mexican Volcanic Belt: An Exposition of Taxonomic Methods. Ithaca, N.Y.: Comstock Pub. Associates, 1959.
MLA (9th ed.) CitationClausen, Robert Theodore. Sedum of the Trans-Mexican Volcanic Belt: An Exposition of Taxonomic Methods. Comstock Pub. Associates, 1959.
Warning: These citations may not always be 100% accurate.