Improving Your Thai Pronunciation [Electronic resource] : A guide to mastering Thai sounds / B. P. Becker ... – USA : Paiboon Publishing, 2003. - electron. data text, 1 electron. opt. disc (CD-ROM) ; sound;+ 1 textbook . - Audio disc is with text book . . – [n. c.] – 1-887521-26-7 : 100 tg.