1. Adler, M., & Ziglio, E. (1996). Gazing into the Oracle: The Delphi method and its application to social policy and public health. Jessica Kingsley Publishers.
2. An Duong Department of Agriculture and Rural Development [ADDA]. (2016). Announcement on enhancing the direction of agricultural production and aquaculture in the spring in 2016. Hai Phong.
3. An Duong Department of Agriculture and Rural Development [ADDA]. (2018). Situation and results of agricultural production in 2011–2015: Directions, tasks for 2012–2018. Hai Phong.
4. An Duong People’s Committee [ADC]. (2015). Report of the business years 2010–2015. Hai Phong.
5. An Duong People’s Committee [ADC]. (2018). Report on the implementation of socio-economic, defense-security tasks in 2018, targets, tasks and solutions in 2019 in an Duong province. Hai Phong.