This study was based on the lack of knowledge and sources of information and the absence of media development regarding the potential utilization of telang flowers (Clitoria ternatea L.) as a natural indicator of food packaging among the general public. Therefore, the development of information media in the form of a biology reference book based on the utilization of the potential of telang flowers as a natural indicator of food packaging, assessing the feasibility of the developed reference book, and the community's response to the developed biology reference book. The research method used is R&D (Research and Development) with the 4-D development model modified into 3-D, which consists of 3 stages Define, Design, and Develop. The biology reference book developed is classified as feasible to use because it obtained an average score of 92.66% (very good) on the material expert validation and a percentage of 79.60% (enough) on the media expert validation. The results of the community's response are good categories with an average percentage of 80.99%. So, it is feasible to use a source of information for the general public. This research produced a source of information in the form of a biology reference book for the general public
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