Krsek, O. Pedagogical principals of deaf teachers' training in the USA. Габрово: 2012 378-383,.
Krsek, O. Pedagogical principals of deaf teachers' training in the USA. Габрово: 2012 378-383,.
Krsek, O. (2012) Pedagogical principals of deaf teachers' training in the USA, Габрово: 378-383,.
Krsek, O. (2012). Pedagogical principals of deaf teachers' training in the USA. Speech communication. Формиране на гражданина и професионалиста в условията на университетското образование (с. 378-383). Габрово: Кн. 1 Т. 2 (1).
Krsek O. Pedagogical principals of deaf teachers' training in the USA: Speech communication. Габрово: 2012. p. 378-383.