Barrow, Christopher J.
Essex Longman Scientific & Technical, 1987
Buku Teks
Pradhana Adhika S.
2017
UI - Skripsi Membership
Coy, David V.
Longram, 1989
Buku Teks
Wong, Nyuk Hien
Taylor and Francis, 2009
Buku Teks
edited by J.R. Landon
Longman Scientific & Technical, 1984
Buku Referensi