ISBN 978-93-86138-42-2 ,Effective Leadership In various Learning Sectors IRPH DELHI_Pub.Year 2017 - Edited By Hirdyesh K Singh

Triratan-The Three Jewels of Buddhism

The 3 swirling segments in centre represent the Buddha, Dharma (the teachings) and Sangha (the spiritual community). A trident, or trisula, with three branches, representing the threefold jewels of Buddhism: Buddha, the Dharma and the Sangha. are the triratna
The wheel can also be divided into three parts, each representing an aspect of Buddhist practice; the hub (discipline), the spokes (wisdom), and the rim (concentration).

                                      Triratna on a Taxila coin, 185-168 BCE,                                                  Symbol of the triratna, as seen in the Sanchi stupa, 1st century BCE.
Tibetan དཀོན་མཆོག་གསུམ,
 Simplified Chinese 三宝
In pali language it is called as 
tiratana,tisarana are actuallyThe Three Jewels
The Buddha
The Dharma (teachings)
The Sangha (community)

 

Buddham saranam gacchami (I go to the Buddha for refuge)
Dhammam saranam gacchami (I go to the Dhamma for refuge)
Sangham saranam gacchami (I go to the Sangha for refuge) 

Sadho sadho sadho
source;http://www.viewonbuddhism.org/general_symbols_buddhism.html