توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Zubaidah. Principals' managerial skills in creating effective schools: Perception of teachers at selected high schools in Padangsidempuan Town, North Sumatra Province, Indonesia.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Zubaidah. Principals' Managerial Skills in Creating Effective Schools: Perception of Teachers at Selected High Schools in Padangsidempuan Town, North Sumatra Province, Indonesia.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Zubaidah. Principals' Managerial Skills in Creating Effective Schools: Perception of Teachers at Selected High Schools in Padangsidempuan Town, North Sumatra Province, Indonesia.