APA
International Congress of Systematic and Evolutionary Biology, International Congress of Systematic and Evolutionary Biology, International Congress of Systematic and Evolutionary Biology, Dudley E. C. & Smithsonian Institution. (1991). The unity of evolutionary biology: proceedings of the Fourth International Congress of Systematic and Evolutionary Biology, University of Maryland, College Park, USA, July 1990. Portland, Or: Dioscorides Press.
Chicago
International Congress of Systematic and Evolutionary Biology, International Congress of Systematic and Evolutionary Biology, International Congress of Systematic and Evolutionary Biology, Dudley Elizabeth Corning and Smithsonian Institution. 1991. The unity of evolutionary biology: proceedings of the Fourth International Congress of Systematic and Evolutionary Biology, University of Maryland, College Park, USA, July 1990. Portland, Or: Dioscorides Press.
Harvard
International Congress of Systematic and Evolutionary Biology, International Congress of Systematic and Evolutionary Biology, International Congress of Systematic and Evolutionary Biology, Dudley E. C. and Smithsonian Institution. (1991). The unity of evolutionary biology: proceedings of the Fourth International Congress of Systematic and Evolutionary Biology, University of Maryland, College Park, USA, July 1990. Portland, Or: Dioscorides Press.
MLA
International Congress of Systematic and Evolutionary Biology, International Congress of Systematic and Evolutionary Biology, International Congress of Systematic and Evolutionary Biology, Dudley Elizabeth Corning and Smithsonian Institution. The unity of evolutionary biology: proceedings of the Fourth International Congress of Systematic and Evolutionary Biology, University of Maryland, College Park, USA, July 1990. Portland, Or: Dioscorides Press. 1991.