North-Holland , 1981
Buku Teks
edited by O.D. Anderson
North-Holland , 1982
Buku Teks
Simatupang, Richard Burton, author
Rineka Cipta, 2003
Buku Teks
Allen, Everett T., author
Richard D.Irwin, Inc., 1981
Buku Teks
Brannan, Tom, author
Gramedia Pustaka Utama, 1998
Buku Teks