Zhelyazkova, G., Zhelyazkova, Slaveya Gencheva Towards Viability and Sustainability of the Tourism in Bulgaria,
Batumi State Maritime Academy, 2016, pp. 175 - 185, ISBN 978-9941-0-9114-8.
Zhelyazkova, G., Zhelyazkova, Slaveya Gencheva .
Towards Viability and Sustainability of the Tourism in Bulgaria.
Batumi: Batumi State Maritime Academy, 2016, pp. 175 - 185, ISBN 978-9941-0-9114-8.
Zhelyazkova, G., Zhelyazkova, Slaveya Gencheva (2016)
Towards Viability and Sustainability of the Tourism in Bulgaria,
Batumi: Batumi State Maritime Academy, pp. 175 - 185, ISBN 978-9941-0-9114-8
* Моля, проверите цитатите за точност, преди да ги включите в работата си.
