Marcelino Jerónimo Assis Belo, Markus Doddy Simanjuntak, Heri Enjang Syahputra, Ivan Elisabeth Purba, and Owen De Pinto Simanjuntak, “Path Analysis of Teacher Performance as a Mediator of the Effect of Principal Leadership on Student Academic Achievement in Vocational Secondary Schools”, Profit, vol. 5, no. 3, pp. 286–295, Jul. 2026.