Boardman, John
Prentice-Hall, 1990
Buku Teks
Alexander Kossiakoff 1945-, William N. Sweet, Samuel J. Seymour, Steven M. Biemer
Wiley-Interscience, 2011
Buku Teks
Borky, John M.
Springer Cham, 2019
eBooks
Hargreaves, Martin
Longman, 1996
Buku Teks
Beam, Walter R.
McGraw-Hill , 1990
Buku Teks SO