Brihat Parashara Hora Shastra
दशासमाः क्रमादेषां षड् दशाऽश्वा गजेन्दवः । नृपाला नवचन्द्राश्च नवचन्द्रा नगा नखाः ॥ १५॥
The periods of Dashas of Sūrya, Candr, Mangal, Rahu, Guru, Śani, Budh, Ketu and Śukr are 6, 10, 7, 18, 16, 19, 17, 7 and 20 in that order.
english translation
dazAsamAH kramAdeSAM SaD dazA'zvA gajendavaH । nRpAlA navacandrAzca navacandrA nagA nakhAH ॥ 15॥
hk transliteration by Sanscript