Citations refer to the original publication, not to a Scieee localized version.
Santisteban, G. D. (n.d.). Historia del infante D. Pedro de Portugal. https://idus.us.es/items/798dfbc6-5b37-4281-9a54-e1d787516a30
Santisteban, Gómez de. Historia del infante D. Pedro de Portugal. https://idus.us.es/items/798dfbc6-5b37-4281-9a54-e1d787516a30.
Santisteban, Gómez de. Historia del infante D. Pedro de Portugal. n.d. https://idus.us.es/items/798dfbc6-5b37-4281-9a54-e1d787516a30.
Santisteban, G. D. (no date) Historia del infante D. Pedro de Portugal. Available at: https://idus.us.es/items/798dfbc6-5b37-4281-9a54-e1d787516a30.
G. D. Santisteban, “Historia del infante D. Pedro de Portugal,” [Online]. Available: https://idus.us.es/items/798dfbc6-5b37-4281-9a54-e1d787516a30
@misc{santistebanhistoria,
author = {Santisteban, Gómez de},
title = {Historia del infante D. Pedro de Portugal},
url = {https://idus.us.es/items/798dfbc6-5b37-4281-9a54-e1d787516a30}
}
The source metadata has no journal, volume or pages. Add them from the original publication if your citation needs them.