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Rajagukguk, Wilson and Samosir, Omas Bulan and Rajagukguk, Josia and Rajagukguk, Hasiana Emanuela (2024) Service quality and supply chain value on customer loyalty: The role of customer relationship management. Uncertain Supply Chain Management, 12.
Rajagukguk, Wilson and Samosir, Omas Bulan and Samosir, Perak and Rajagukguk, Hasiana Emanuela and Napitupulu, Ruth Natasha (2025) Game Theory Analisis Konflik : Pendekatan Matematika untuk Pengambilan Keputusan, Teologia, Ekonomi, Sains, dan Risiko. UKI Press, Jakarta. ISBN 978 623 8737 89 5