Shiva Purana
बिन्दुत्रिकोणषट्कोणवृत्ताकाराणि च क्रमात् ॥ शंखं च पुरतस्थाप्य पूजोक्तक्रममार्गतः ॥ ४ ॥
The Bindu, triangle, hexagon and circle shall be drawn in order. The conch shall be placed in front in accordance with the rales of worship.
english translation
bindutrikoNaSaTkoNavRttAkArANi ca kramAt ॥ zaMkhaM ca puratasthApya pUjoktakramamArgataH ॥ 4 ॥
hk transliteration by Sanscript