Dyfyniad APA
Birdie, G. S., & Birdie, J. S. (2003). Water supply and sanitary engineering: Including environmental engineering water and Air Pollution Act's. Dhanpat Rai.
Dyfyniad Arddull Chicago
Birdie, G. S., and J. S. Birdie. Water Supply and Sanitary Engineering: Including Environmental Engineering Water and Air Pollution Act's. New Delhi: Dhanpat Rai, 2003.
Dyfyniad MLA
Birdie, G. S., and J. S. Birdie. Water Supply and Sanitary Engineering: Including Environmental Engineering Water and Air Pollution Act's. Dhanpat Rai, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.