Sudarso, Andriasan and Purba, Bonaraja and Ardiana, Dewa Putu Yudhi and Manullang, Sardjana Orba and Karim, Abdul and Purba, Pratiwi Bernadetta and Muliana, Muliana and Siagian, Valentine and Siregar, Muhammad Noor Hasan and Jamaludin, Jamaludin and Sudarmanto, Eko and Ashoer, Muhammad and Nugraha, Nur Arif and Septarini, Ri Sabti (2020) Konsep E-Bisnis. Yayasan Kita Menulis, Medan. ISBN 978-623-6761-53-3
Rahmadana, Muhammad Fitri and Mawati, Arin Tentrem and Siagian, Nurhayati and Perangin-angin, Mori Agustina and Refelino, John and Tojiri, Moch. Yusuf and Siagian, Valentine and Nugraha, Nur Arif and Manullang, Sardjana Orba and Silalahi, Marto and Yendrianof, Devi and Sari, Anggri Puspita and Supriadi, Made Nopen and Sari, Marlynda Happy Nurmalita and Bahri, Samsyul (0202) Pelayanan Publik. Yayasan Kita Menulis, Medan.