Levi, Werner
University of Minnesota Press, 1954
Buku Teks
Clark Unioversity Press, 1955
Buku Teks
Werner, E. T. C.
George G. Harrap & Co. Ltd., 1922
Buku Teks
Sombart, Werner
Duncker & Humbolt, 1922
Buku Klasik
Sombart, Werner
Dunker & Humblot, 1922
Buku Klasik