APA

Beissinger S. R., Steadman E. C., Wohlgenant T. J., Blate G. & Zack S.Null models for assessing ecosystem conservation priorities: threatened birds as titers of threatened ecosystem in South America. : .

Chicago

Beissinger Steven R, Steadman Eric C, Wohlgenant Timothy J, Blate Geoffrey and Zack Steve.Null models for assessing ecosystem conservation priorities: threatened birds as titers of threatened ecosystem in South America. : .

Harvard

Beissinger S. R., Steadman E. C., Wohlgenant T. J., Blate G. and Zack S.Null models for assessing ecosystem conservation priorities: threatened birds as titers of threatened ecosystem in South America. : .

MLA

Beissinger Steven R, Steadman Eric C, Wohlgenant Timothy J, Blate Geoffrey and Zack Steve.: . .