Ivanov, S., Zhechev, V. Perspectives for the Development of Bio Products Market in Bulgaria. Махачкала: Изд. дом Наука плюс, 2013 с. 69 - 72, 978-5-903063-89-5.
Ivanov, S., Zhechev, V. Perspectives for the Development of Bio Products Market in Bulgaria. Махачкала: Изд. дом Наука плюс, 2013 с. 69 - 72, 978-5-903063-89-5.
Ivanov, S., Zhechev, V. (2013) Perspectives for the Development of Bio Products Market in Bulgaria, Махачкала: Изд. дом Наука плюс с. 69 - 72, 978-5-903063-89-5.
Ivanov, S., & Zhechev, V. (2013). Perspectives for the Development of Bio Products Market in Bulgaria. Marketing Aspects. Махачкала: Изд. дом Наука плюс, с. 69 - 72.
Ivanov S, Zhechev V. Perspectives for the Development of Bio Products Market in Bulgaria: Marketing Aspects. Махачкала: Изд. дом Наука плюс; 2013. p. с. 69 - 72. ISBN: 978-5-903063-89-5.
