Pepper, T., & Hoppé, E. O. (1978). Camera portraits by E. O. Hoppé, 1878 - 1972.
Chicagoスタイル(17版)引用形式Pepper, Terence, , Emil Otto Hoppé. Camera Portraits by E. O. Hoppé, 1878 - 1972. London, 1978.
MLA(8版)引用形式Pepper, Terence, , Emil Otto Hoppé. Camera Portraits by E. O. Hoppé, 1878 - 1972. 1978.
警告: この引用は必ずしも正確ではありません.