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. 2021 Apr 1;1(1):e2. doi: 10.52225/narraj.v1i1.2

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© 2021 The Author(s).

This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (CC BY NC 4.0), which permits copying, adaptation and redistribution, provided the original work is properly cited (https://creativecommons.org/licenses/by-nc/4.0/).

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Figure 2. — Co-occurrence all keywords network visualization mapping based on total link strength (TLS). The 31 keywords made 4 clusters; cluster 1 red color (9 keywords), cluster 2 green color (9 keywords), cluster 3 blue color (8 keywords), and cluster 4 yellow color (5 keywords).