Bion, W.R.
Basic Book, Inc. , 1961
Buku Teks
Kemp, C. Gratton
Hoghton Mifflin, 1964
Buku Teks
Terry, Morgan, author
Pearson, 2007
Buku Teks
Adams, Katherine L., author
McGraw-Hill, 2003
Buku Teks
Adams, Katherine L., author
McGraw-Hill, 2009
Buku Teks