APA-viite (7. p.)

(1973). Speyer cathedral: Cathedral church. Papal basilica (3a. ed.). Schnell and Stein.

Chicago-viite (17. p.)

Speyer Cathedral: Cathedral Church. Papal Basilica. 3a. ed. Múnich: Schnell and Stein, 1973.

MLA-viite (9. p.)

Speyer Cathedral: Cathedral Church. Papal Basilica. 3a. ed. Schnell and Stein, 1973.