Hazen, Kirk, author
Massachusetts : Wiley Blackwell, 2015
Buku Teks
Hughes, John P., author
Random House, 1966
Buku Teks
Fromkin, Victoria A., author
Holt, Rinehart and Winston, 1981
Buku Teks
Coulthard, Malcolm, author
Routledge, 2017
Buku Teks
Ottenheimer, Harriet Joseph, author
Wadsworth and Cengage Learning, 2013
Buku Teks