APA-referens

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

Chicago-stil citat

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

MLA-referens

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

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.