Cita APA

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

Citación estilo Chicago

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

Cita MLA

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

Warning: These citations may not always be 100% accurate.