Nitaya Yamwankaew. 2004. Knowledge and attitude of undergraduate tourism management students towards marine tourism resource conservation. Field of Study Environmental Education, Mahidol University;
Nitaya Yamwankaew. (2004) Knowledge and attitude of undergraduate tourism management students towards marine tourism resource conservation . Mahidol University/Bangkok.
Nitaya Yamwankaew. Knowledge and attitude of undergraduate tourism management students towards marine tourism resource conservation. . Bangkok:Mahidol University, 2004.
Nitaya Yamwankaew. (2004) Knowledge and attitude of undergraduate tourism management students towards marine tourism resource conservation . Mahidol University/Bangkok.