Brihat Parashara Hora Shastra
अथा कालदशा चक्रदशा प्रोक्ता मुनीश्वरैः । कालचक्रदशा चाऽया मान्यासर्वदशासु या ॥ ६॥
O Brahmin! Some Maharishis have made a mention of Kala and Chakr Dasha, but they have recognized the Kala Chakr Dasha, as supreme.
english translation
athA kAladazA cakradazA proktA munIzvaraiH । kAlacakradazA cA'yA mAnyAsarvadazAsu yA ॥ 6॥
hk transliteration by Sanscript