This study aims to analyze the effect of promotion and service quality on donor trust and loyalty to the Mentari Ilmu Foundation. This study used a quantitative approach with a survey method of 30 people. Measurement of variables using a Likert scale with a weight of 1 to 5. This study found that promotion has a positive and significant effect on loyalty, service quality has a positive and significant effect on loyalty, trust has a positive and significant effect on loyalty, promotion has an effect on loyalty through trust.
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