Huffman, Karen, author
John Wiley & Sons, 1997
Buku Teks
Huffman, Karen, author
John Wiley & Sons, 1994
Buku Teks
Korgen, Kathleen Odell, author
Sage, 2019
Buku Teks
Hayakawa, S.I., author
Harcourt, Brace, 1940
Buku Teks
Beneficial Management Institute, [Date of publication not identified]
Buku Teks