Murdoch, James
Macmillan, 1972
Buku Teks
Vania Devina, author
2018
UI - Skripsi (Membership)
edited by Denis Arnold
Oxford University Press, 1992
Buku Referensi
Sianturi, Johnny Ferry Hamonangan, author
Fakultas Teknik Universitas Indonesia, 1992
UI - Skripsi (Membership)
edited by Richard Parncutt and Gary E. McPherson
Oxford University Press, 2002
Buku Teks