Billington, Ray Allen, author
Macmillan, 1967
Buku Teks
Irving, Washington, author
PT Mizan Publika, 2015
Buku Teks
Willi, Walter
Benno Schwabe & Co, 1948
Buku Teks
Lahiri, Nayanjot, author
Seagull Books, [Date of publication not identified]
Buku Teks
Anindya Kusuma Wardhani, author
Fakultas Teknik Universitas Indonesia, 1999
UI - Skripsi (Membership)