Bloomsbury, 1990
Buku Referensi
Sharpe, Gareth
Guinness Publishing, 1994
Buku Referensi
Betty Lusiawaty
Self-Publishing, 2023
Buku Teks SO
consultant ed. Tanya A. McFerran
Oxford University Press, 1996
Buku Referensi
Cohen, John Michael, 1903-1989
Viking, 1993
Buku Referensi