©2013 National Research Council of Thailand
Peeriya Pongsarigun. 2006. Variants of initial clusters with /r/ among Thai first-year undergraduate students : cross-linguistic influence and the markedness theory in setting up the level of difficulty in pronunciation /Peeriya Pongsarigun. Field of Study English, Chulalongkorn University;
Peeriya Pongsarigun. (2006) Variants of initial clusters with /r/ among Thai first-year undergraduate students : cross-linguistic influence and the markedness theory in setting up the level of difficulty in pronunciation /Peeriya Pongsarigun . Chulalongkorn University/Bangkok.
Peeriya Pongsarigun. Variants of initial clusters with /r/ among Thai first-year undergraduate students : cross-linguistic influence and the markedness theory in setting up the level of difficulty in pronunciation /Peeriya Pongsarigun. . Bangkok:Chulalongkorn University, 2006.
Peeriya Pongsarigun. (2006) Variants of initial clusters with /r/ among Thai first-year undergraduate students : cross-linguistic influence and the markedness theory in setting up the level of difficulty in pronunciation /Peeriya Pongsarigun . Chulalongkorn University/Bangkok.