INFORMAL is indexed and abstracted in:

Google Scholar

Google Scholar is a freely accessible web search engine that indexes the full text of scholarly literature across an array of publishing formats and disciplines.

Sinta

Sinta (Science and Technology Index), delivering acces to citations and expertise in Indonesia. Web-based research information system offering fast access, easy and comprehensive to measure the performance of researchers, institutions and journals in Indonesia. Sinta provide benchmarks and analysis, identification of research strength of each institution to develop collaborative partnerships, to analyze the trend of research and expert directories

Crossref

Crossref makes research outputs easy to find, cite, link, assess, and reuse. We’re a not-for-profit membership organization that exists to make scholarly communications better.