Smith, Harriet Fullen
Ginn and Company, 1961
Buku Teks
Inkeles, Alex, author
Harvard University Press, 1959
Buku Teks
Kinsella, Sophie, author
Gramedia Pustaka Utama, 2022
Buku Teks
Feldman, Robert S., author
McGraw-Hill, 2013
Buku Teks
Armey, Dick
Fawcett Columbine, 1996
Buku Teks