S. Murtini, A. Sutedjo, I. M. Zain, and S. A. Sabitah, “An EFFECTIVENESS OF LEARNING OUTCOMES OF TOURISM GEOGRAPHY TEXTBOOK FOR STUDENT IN GEOGRAPHY EDUCATION STUDY PROGRAM”, J. GEOGR. Geogr. dan Pengajarannya, vol. 20, no. 2, pp. 66–76, Dec. 2022.