by Manik, Kresna Ningsih, Tarigan, Merry Susanty Br, Sinaga, Dolli Rotua
Published in Journal of Pragmatics Research (28.09.2023)

by Sinaga, Rotua, Sukadi, Abdurachman, Somasetia, Dadang Hudaya
Published in Paediatrica Indonesiana (31.08.2007)

by Ramadhani, S.Pd., M.Pd, Irham, Purwanto, Purwanto, Sinaga, Lihardo Rotua
Published in JURNAL IKATAN ALUMNI FISIKA (31.12.2022)

by Ramadhani, Irham, Purwanto, Purwanto, Sani, Ridwan Abdullah, Nasution, Budiman, Sinaga, Lihardo Rotua, Rangkuti, Afrida Khairani
Published in The 9th Annual International Seminar on Trends in Science and Science Education (AISTSSE) 2022 (2023)