Citations refer to the original publication, not to a Scieee localized version.
Sevin, H. E., & Okutan, E. (2009). TK1951: an anatomy of crisis communication. ESIC. https://idus.us.es/items/2f79d4b0-d0a1-4d35-ba9f-e4b79840afc5
Sevin, Hasan Efe, and Emin Okutan. TK1951: an anatomy of crisis communication. ESIC, 2009. https://idus.us.es/items/2f79d4b0-d0a1-4d35-ba9f-e4b79840afc5.
Sevin, Hasan Efe, and Emin Okutan. TK1951: an anatomy of crisis communication. ESIC, 2009. https://idus.us.es/items/2f79d4b0-d0a1-4d35-ba9f-e4b79840afc5.
Sevin, H. E. and Okutan, E. (2009) TK1951: an anatomy of crisis communication. ESIC. Available at: https://idus.us.es/items/2f79d4b0-d0a1-4d35-ba9f-e4b79840afc5.
H. E. Sevin and E. Okutan, “TK1951: an anatomy of crisis communication,” ESIC, 2009. [Online]. Available: https://idus.us.es/items/2f79d4b0-d0a1-4d35-ba9f-e4b79840afc5
@misc{sevin2009tk1951,
author = {Sevin, Hasan Efe and Okutan, Emin},
title = {TK1951: an anatomy of crisis communication},
year = {2009},
publisher = {ESIC},
url = {https://idus.us.es/items/2f79d4b0-d0a1-4d35-ba9f-e4b79840afc5}
}
The source metadata has no journal, volume or pages. Add them from the original publication if your citation needs them.