Weber, Max, 1864-1920, author
The free Press, 1966
Buku Teks
Johnson, George B., author
McGraw-Hill, Higher Education, 2008
Buku Teks
Johnson, George B., author
McGraw-Hill, 2003
Buku Teks
Buck, Pearl S. (Pearl Sydenstricker), 1892-1973, author
John Day, 1963
Buku Teks
Lococo, Anita, author
Taschen, 2011
Buku Referensi