Rakadzhiyska, S., Dyankov, T., Yancheva, K. Bulgaria - Tourism Higher Education. Bulgaria's Contribution for the Development of Tourism Specialized Higher Education and Training. Saarbrucken: LAP Lambert Acad. Publ., 2016 154 p. ISBN 978-3-659-94050-7.
Rakadzhiyska, S., Dyankov, T., Yancheva, K. Bulgaria - Tourism Higher Education. Bulgaria's Contribution for the Development of Tourism Specialized Higher Education and Training. Saarbrucken: LAP Lambert Acad. Publ., 2016 154 p. ISBN 978-3-659-94050-7.
Rakadzhiyska, S., Dyankov, T., Yancheva, K. (2016) Bulgaria - Tourism Higher Education. Bulgaria's Contribution for the Development of Tourism Specialized Higher Education and Training, Saarbrucken: LAP Lambert Acad. Publ. 154 p. ISBN 978-3-659-94050-7.
Rakadzhiyska, S., Dyankov, T., & Yancheva, K. (2016). Bulgaria - Tourism Higher Education. Bulgaria's Contribution for the Development of Tourism Specialized Higher Education and Training. Saarbrucken: LAP Lambert Acad. Publ., 154 p.
Rakadzhiyska S, Dyankov T, Yancheva K. Bulgaria - Tourism Higher Education. Bulgaria's Contribution for the Development of Tourism Specialized Higher Education and Training. Saarbrucken: LAP Lambert Acad. Publ.; 2016. p. 154 p. ISBN: ISBN 978-3-659-94050-7.
