Roy, Sister Callista, author
Appleton & Lange, 1991
Buku Teks
Roy, Sister Callista, author
Appleton & Lange, 1999
Buku Teks
Roy, Callista, author
Pearson, 2009
Buku Teks
Blough, Roy
McGraw-Hill , 1966
Buku Teks
Baskind, Eric, author
Routledge, 2017
Buku Teks