APA

Benson W. W., Brown K. S. & Gilbert L. E.Coevolution of plants and herbivores: passion flower butterflies. : .

Chicago

Benson Woodruff W, Brown Keith S and Gilbert Lawrence E.Coevolution of plants and herbivores: passion flower butterflies. : .

Harvard

Benson W. W., Brown K. S. and Gilbert L. E.Coevolution of plants and herbivores: passion flower butterflies. : .

MLA

Benson Woodruff W, Brown Keith S and Gilbert Lawrence E.: . .