Adams, Francis V., author
McGraw-Hill, 2007
Buku Teks
compiled and edited by Samuel E. Krug
Metritech, 1993
Buku Referensi
Oxford University Press, 2014
Buku Teks
Leclerc, Annie, author
Kanisius, 2000
Buku Teks
Acosta-Hauser, Alessandra, author
Edizioni Guerra, 1994
Buku Teks