Nation, James L., author
CRC Press, Taylor & Francis Group, 2008
Buku Teks
Seeley, Rod R., author
McGraw-Hill, 2002
Buku Teks
Silverthorn, Dee Unglaub, author
Pearson, Benjamin Cummings, 2010
Buku Teks
Rao, K.N., author
S. Chand & Co, 1970
Buku Teks
Moore, Thomas C., author
Springer-Verlag, 1989
Buku Teks