APA

RYANS J. L., ROPER D. L., . (198). PROCESS VACUUM SYSTEM: DESIGN AND OPERATION. NEW YORK ; MEXICO: MCGRAW-HILL.

Chicago

RYANS JAMES L, ROPER DANIEL L, . 198. PROCESS VACUUM SYSTEM: DESIGN AND OPERATION. NEW YORK ; MEXICO: MCGRAW-HILL.

Harvard

RYANS J. L., ROPER D. L., . (198). PROCESS VACUUM SYSTEM: DESIGN AND OPERATION. NEW YORK ; MEXICO: MCGRAW-HILL.

MLA

RYANS JAMES L, ROPER DANIEL L, . PROCESS VACUUM SYSTEM: DESIGN AND OPERATION. NEW YORK ; MEXICO: MCGRAW-HILL. 198.