Vasudev, G. D. (2003). Clues to interesting charts. UBS.
Dyfyniad Arddull ChicagoVasudev, Gayatri Devi. Clues to Interesting Charts. New Delhi: UBS, 2003.
Dyfyniad MLAVasudev, Gayatri Devi. Clues to Interesting Charts. UBS, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.