Lesikar, Raymond V. (Raymond Vincent), author
Dow Jones-Irwin , 1974
Buku Teks
International Labour Office,, 1966
Buku Teks
Nguyen-Dinh-Hoa
Tuttle Company, 1966
Buku Teks
Adler, Mortimer Jerome, 1902-2001, author
iPublishing, 2007
Buku Teks
Graves, Robert Muir, author
John Wiley & Sons, 1998
Buku Teks