APA
Barbault, R., Colwell, R. K., Dias, B., Hawksworth, D. L., Huston, M., Laserre, P., … Younes, T. (1991). Conceptual framework and research issues for species diversity at the community level. From Genes to Ecosystems: a Research Agenda for Biodiversity. IUBS, Cambridge, Mass, 37–71.
Chicago/Turabian
Barbault, R, RK Colwell, B Dias, DL Hawksworth, M Huston, P Laserre, D Stone, and T Younes. “Conceptual Framework and Research Issues for Species Diversity at the Community Level.” From genes to ecosystems: a research agenda for biodiversity. IUBS, Cambridge, Mass (1991): 37–71.
MLA
Barbault, R., et al. “Conceptual Framework and Research Issues for Species Diversity at the Community Level.” From Genes to Ecosystems: a Research Agenda for Biodiversity. IUBS, Cambridge, Mass, 1991, pp. 37–71.