Homans, George Caspar, 1910-1989, author
Harcourt, Brace, 1950
Buku Teks
Adams, Katherine L., author
McGraw-Hill, 2012
Buku Teks
Adams, Katherine L., author
McGraw-Hill, 2003
Buku Teks
Tubbs, Stewart L., author
McGraw-Hill, 1995
Buku Teks
LoCicero, Joe, author
Adams Media, 2007
Buku Teks