APA Style

Howe, Henry F., Caplan, Lionel. (). Ecological relationships of plants and animals . : .

Chicago Style

Howe, Henry F., Caplan, Lionel. Ecological relationships of plants and animals. : , . .

MLA Style

Howe, Henry F., Caplan, Lionel. Ecological relationships of plants and animals. : , . .

Turabian Style

Howe, Henry F., Caplan, Lionel. Ecological relationships of plants and animals. : , . .