Citations refer to the original publication, not to a Scieee localized version.
den Engelse, N., Wijnhoven, F., & Groen, A. (2011). A classification of social media methods of environmental scanning for entrepreneurial opportunity development. Universidad de Sevilla. https://idus.us.es/items/ce154787-4197-48b5-9f55-75890c80d4d2
den Engelse, Natalie, et al. A classification of social media methods of environmental scanning for entrepreneurial opportunity development. Universidad de Sevilla, 2011. https://idus.us.es/items/ce154787-4197-48b5-9f55-75890c80d4d2.
den Engelse, Natalie, Fons Wijnhoven, and Aard Groen. A classification of social media methods of environmental scanning for entrepreneurial opportunity development. Universidad de Sevilla, 2011. https://idus.us.es/items/ce154787-4197-48b5-9f55-75890c80d4d2.
den Engelse, N., Wijnhoven, F. and Groen, A. (2011) A classification of social media methods of environmental scanning for entrepreneurial opportunity development. Universidad de Sevilla. Available at: https://idus.us.es/items/ce154787-4197-48b5-9f55-75890c80d4d2.
N. den Engelse, F. Wijnhoven, and A. Groen, “A classification of social media methods of environmental scanning for entrepreneurial opportunity development,” Universidad de Sevilla, 2011. [Online]. Available: https://idus.us.es/items/ce154787-4197-48b5-9f55-75890c80d4d2
@misc{denengelse2011classification,
author = {den Engelse, Natalie and Wijnhoven, Fons and Groen, Aard},
title = {A classification of social media methods of environmental scanning for entrepreneurial opportunity development},
year = {2011},
publisher = {Universidad de Sevilla},
url = {https://idus.us.es/items/ce154787-4197-48b5-9f55-75890c80d4d2}
}
The source metadata has no journal, volume or pages. Add them from the original publication if your citation needs them.