Baltacı and Coşkun
Arkan Sezgin and Baysal
Doğan and Saraçoğlu
Köseoğlu and Yıldız
Öztürk and Aksu
Sevinç Tuhanioğlu and Gizir
Alev BULUT
(HAYEF: Journal of Education 2007; 4: 65-77)