Link, P., & Wink, M. (1999). Phylogeny and taxonomic subdivision of Bitis (Reptilia: Viperidae): Based on molecular evidence. Phylogeny and systematics of the Viperidae.
Chicago Style (17th ed.) CitationLink, Peter, and Michael Wink. "Phylogeny and Taxonomic Subdivision of Bitis (Reptilia: Viperidae): Based on Molecular Evidence." Phylogeny and Systematics of the Viperidae 1999.
MLA (9th ed.) CitationLink, Peter, and Michael Wink. "Phylogeny and Taxonomic Subdivision of Bitis (Reptilia: Viperidae): Based on Molecular Evidence." Phylogeny and Systematics of the Viperidae, 1999.
Warning: These citations may not always be 100% accurate.