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Buku Teks
Keeton, George W., 1902-1989, author
Sir Isaac Pitman and Sons, 1950
Buku Teks
Bima Ruditya Surya, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2014
UI - Tesis (Membership)
Gunton, George
Appelton and Company , 1899
Buku Teks
Scott, Austin Wakeman, 1884-1981, author
Little, Brown, 1963
Buku Teks