(1973). Speyer cathedral: Cathedral church. Papal basilica (3a. ed.). Schnell and Stein.
Chicagoスタイル(17版)引用形式Speyer Cathedral: Cathedral Church. Papal Basilica. 3a. ed. Múnich: Schnell and Stein, 1973.
MLA(9版)引用形式Speyer Cathedral: Cathedral Church. Papal Basilica. 3a. ed. Schnell and Stein, 1973.
警告: この引用は必ずしも正確ではありません.