APA

Putnam A. R., Duke W. B., .Allelopathy in agroecosystems. : .

Chicago

Putnam Alan R, Duke William B, .Allelopathy in agroecosystems. : .

Harvard

Putnam A. R., Duke W. B., .Allelopathy in agroecosystems. : .

MLA

Putnam Alan R, Duke William B, .: . .