Baltacı and Coşkun
Arkan Sezgin and Baysal
Doğan and Saraçoğlu
Köseoğlu and Yıldız
Öztürk and Aksu
Sevinç Tuhanioğlu and Gizir
Ercan ATASOY, Şengül ATASOY
(HAYEF: Journal of Education 2006; 3: 1-18)