Phuthong, T. 2026. Beyond the 3PL Black Box: An Integrated Study of Mediating Mechanisms and the Moderating Effects of Perceived Risk and Usage Frequency in Thai Platform-Bound Delivery. International Review of Management and Marketing. 17, 1 (Nov. 2026), 8–21. DOI:https://doi.org/10.32479/irmm.24341.