edited by G. Richard Scott, Joel D. Irish
Cambridge University Press, 2013
Buku Teks
Hougen, Olaf A., author
John Wiley & Sons, 1960
Buku Teks
Prothero, Donald R., author
McGraw-Hill, 2010
Buku Teks
Prothero, Donald R.
McGraw-Hill Higher Education, 2004
Buku Referensi
edited by A.D. Buckingham, E. Lippert, S. Bratos
John Wiley & Sons, 1978
Buku Teks