Halimmah, Zarica. 2021. “Peningkatan Kualitas Pelatihan Dengan Metode Servqual Dan Quality Function Deployment: Studi Kasus Di Perusahaan Reasuransi”. Operations Excellence: Journal of Applied Industrial Engineering 13 (3). Jakarta, Indonesia:276-87. https://doi.org/10.22441/oe.2021.v13.i2.025.