Ramli, Muhammad Ridha, et al. “The Impact of Trump’s Import Tariff Policy: How Is the Condition of the Disparities in Abnormal Returns and Stock Trading Volumes in Indonesia?”. Majalah Bisnis & IPTEK, vol. 18, no. 2, Dec. 2025, pp. 221-9, https://doi.org/10.55208/bistek.v18i2.404.