Gaya APA

IGWE, G, J, I. (1987). NEEDLE FELTS IN GAS AND DUST FILTRATION: DESIGN OF MECHANICALLY-BONDED FILTERS . England: ELLIS HORWOOD LIMITED.

Gaya MLA

IGWE, G., J., I.. "NEEDLE FELTS IN GAS AND DUST FILTRATION: DESIGN OF MECHANICALLY-BONDED FILTERS". England: ELLIS HORWOOD LIMITED, 1987. Textbook.