HERMAN. Pengaruh Harga Pokok Penjualan Terhadap Laba Setelah Pajak. Jurnal Ekonomi dan Bisnis, [S. l.], v. 1, n. 2, p. 75–80, 2022. DOI: 10.57151/jeko.v1i2.60. Disponível em: https://ejournal.poltekbaubau.ac.id/index.php/jeko/article/view/60. Acesso em: 18 jan. 2026.