Nurhidayati, Nurhidayati and Saefuddin, Ady and Yuli, Agus and Fajarwati, Dian and Ananti, Dina and Chandrawati, Farika and Giyarni, Giyarni and Rini, Indah and Syamsuri, Syamsuri and Budiah, Siti and Setyaningrum, Suci (2012) Principals (a new way of making principals and supeervisors) edisi nomor 4 tahun II April 2012. Direktorat Jenderal Guru dan Tenaga Kependidikan, Solo. ISBN 2089-0249