APA

Keller G. E., . (1987). Separations, new directions for an old field. New York, N.Y: American Institute of Chemical Engineers.

Chicago

Keller George E, . 1987. Separations, new directions for an old field. New York, N.Y: American Institute of Chemical Engineers.

Harvard

Keller G. E., . (1987). Separations, new directions for an old field. New York, N.Y: American Institute of Chemical Engineers.

MLA

Keller George E, . Separations, new directions for an old field. New York, N.Y: American Institute of Chemical Engineers. 1987.