Citations refer to the original publication, not to a Scieee localized version.
Paul, A., & Ejea de Escartín, L. D. (n.d.). In processu Antonii Paul. Super iurisfirma. Appendix. Para su confirmacion. [S.l. : s.n., 1661?]. https://idus.us.es/items/c4434a34-1688-45cb-9884-8f7fabec4222
Paul, Antonio, and Luis de Ejea de Escartín. In processu Antonii Paul. Super iurisfirma. Appendix. Para su confirmacion. [S.l. : s.n., 1661?]. https://idus.us.es/items/c4434a34-1688-45cb-9884-8f7fabec4222.
Paul, Antonio, and Luis de Ejea de Escartín. In processu Antonii Paul. Super iurisfirma. Appendix. Para su confirmacion. [S.l. : s.n., 1661?], n.d. https://idus.us.es/items/c4434a34-1688-45cb-9884-8f7fabec4222.
Paul, A. and Ejea de Escartín, L. D. (no date) In processu Antonii Paul. Super iurisfirma. Appendix. Para su confirmacion. [S.l. : s.n., 1661?]. Available at: https://idus.us.es/items/c4434a34-1688-45cb-9884-8f7fabec4222.
A. Paul and L. D. Ejea de Escartín, “In processu Antonii Paul. Super iurisfirma. Appendix. Para su confirmacion,” [S.l. : s.n., 1661?]. [Online]. Available: https://idus.us.es/items/c4434a34-1688-45cb-9884-8f7fabec4222
@misc{paulprocessu,
author = {Paul, Antonio and Ejea de Escartín, Luis de},
title = {In processu Antonii Paul. Super iurisfirma. Appendix. Para su confirmacion},
publisher = {[S.l. : s.n., 1661?]},
url = {https://idus.us.es/items/c4434a34-1688-45cb-9884-8f7fabec4222}
}
The source metadata has no journal, volume or pages. Add them from the original publication if your citation needs them.