Service, Elman R. (Elman Rogers), 1915-1996, author
Harper & Brothers, 1958
Buku Teks
Hoebel, E. Adamson, author
McGraw-Hill, 1958
Buku Teks
Hoebel, E. Adamson, author
Harvard University Press, 1967
Buku Teks
Service, Elman R. (Elman Rogers), 1915-1996, author
Random House, 1971
Buku Teks
Avebury, Lord
Longman, Green and Co., 1912
Buku Teks