APA
Alexander-Perkins Spence, . (1969). Biology of the gall midge rhopalomyia hurtipes O.S. ( Diptera : Cecidomyiidae ) on solidago junce ait. New York: Cornell University Agricultural experiment station.
Chicago
Alexander-Perkins Spence, . 1969. Biology of the gall midge rhopalomyia hurtipes O.S. ( Diptera : Cecidomyiidae ) on solidago junce ait. New York: Cornell University Agricultural experiment station.
Harvard
Alexander-Perkins Spence, . (1969). Biology of the gall midge rhopalomyia hurtipes O.S. ( Diptera : Cecidomyiidae ) on solidago junce ait. New York: Cornell University Agricultural experiment station.
MLA
Alexander-Perkins Spence, . Biology of the gall midge rhopalomyia hurtipes O.S. ( Diptera : Cecidomyiidae ) on solidago junce ait. New York: Cornell University Agricultural experiment station. 1969.