Flippo, Edwin B., author
Erlangga, 1990
Buku Teks
Flippo, Edwin B., author
Erlangga, 1990
Buku Teks
Manullang, M., author
[publisher not identified], [year of publication not identified]
Buku Teks
Gaspersz, Vincent, author
Gramedia Pustaka Utama, 1998
Buku Teks
Dessler, Gary, 1942-, author
Prehallindo, 1997
Buku Teks