edited by Ilka Ruby, Andreas Ruby
Ruby Press, 2010
Buku Teks
Maman Suherman
Pop, 2016
Buku Teks SO
Budianastas Prastyatama
Faculty of Engineering, Universitas Indonesia, 2017
Artikel Jurnal
Tanghe, Jan
Pegamon Press, 1984
Buku Referensi
edited by Kyle Steenland
Oxford University Press, 1993
Buku Teks SO