NAINGGOLAN, elsa ernawati; SIMAMORA, Juliatri Goretti. CHARACTER BUILDING OF ALTRUISM IN ENGLISH TEXTBOOK OF SENIOR HIGH SCHOOL. JURNAL BASIS, [S.l.], v. 7, n. 2, p. 319-330, oct. 2020. ISSN 2527-8835. Available at: <http://ejournal.upbatam.ac.id/index.php/basis/article/view/1962>. Date accessed: 11 apr. 2021. doi: https://doi.org/10.33884/basisupb.v7i2.1962.