APA Citatie

(2011). Water and air quality directory 2011. Kerala state pollution control board.

Chicago Style citaat

Water and Air Quality Directory 2011. Thiruvananthapuram: Kerala state pollution control board, 2011.

MLA citatie

Water and Air Quality Directory 2011. Kerala state pollution control board, 2011.

Let op: Deze citaties zijn niet altijd 100% accuraat.