Baltacı and Coşkun
Arkan Sezgin and Baysal
Doğan and Saraçoğlu
Köseoğlu and Yıldız
Öztürk and Aksu
Sevinç Tuhanioğlu and Gizir
Şengül llgar
(HAYEF: Journal of Education 2005; 2: 119-134)
(HAYEF: Journal of Education 2004; 1: 211-222)