Vassileva, B. Responsible Tourism Initiatives: Comparative Study. Варна: Унив. изд. Наука и икономика, 2019 pp. 42 - 56, ISBN 978-954-21-0997-6.
Vassileva, B. Responsible Tourism Initiatives: Comparative Study. Варна: Унив. изд. Наука и икономика, 2019 pp. 42 - 56, ISBN 978-954-21-0997-6.
Vassileva, B. (2019) Responsible Tourism Initiatives: Comparative Study, Варна: Унив. изд. Наука и икономика pp. 42 - 56, ISBN 978-954-21-0997-6.
Vassileva, B. (2019). Responsible Tourism Initiatives: Comparative Study. Варна: Унив. изд. Наука и икономика, pp. 42 - 56.
Vassileva B. Responsible Tourism Initiatives: Comparative Study. Варна: Унив. изд. Наука и икономика; 2019. p. pp. 42 - 56. ISBN: ISBN 978-954-21-0997-6.
