Husna HN, Zawjiyah SMR, Widia C. Implementation QR-Code for Introducing Optical Instruments . jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2023 Oct. 25 [cited 2025 Apr. 14];9(10):7916-23. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/3821