Cita APA (7th ed.)

Longo, R., & Johns, J. (2018). The first Norman cathedral in Palermo. Robert Guiscard's Church of the Most Holy Mother of God. Brepols.

Cita Chicago (17th ed.)

Longo, R., i J. Johns. The First Norman Cathedral in Palermo. Robert Guiscard's Church of the Most Holy Mother of God. Brepols, 2018.

Cita MLA (9th ed.)

Longo, R., i J. Johns. The First Norman Cathedral in Palermo. Robert Guiscard's Church of the Most Holy Mother of God. Brepols, 2018.