Sobri, A.Y., Bafadal, I., Nurabadi, A., & Gunawan, I. (2019). Validity and reliability of questionnaire problematics leadership beginner school principals. Advances in Social Science, Education and Humanities Research, 381, 250-254.
BERMAKNA
Sobri, A.Y., Bafadal, I., Nurabadi, A., & Gunawan, I. (2019). Validity and reliability of questionnaire problematics leadership beginner school principals. Advances in Social Science, Education and Humanities Research, 381, 250-254.