Spacks, Patricia Meyer
Wiley-Blackwell, 2009
Buku Teks
Plumb, John Harold, 1911-
Penguin Books, 1963
Buku Teks
Anderson, M.S.
Longman, 1971
Buku Teks
Richter, David H., 1945-
Wiley Blackwell, 2017
Buku Teks
Walsh, Linda
John Wiley & Sons, 2017
Buku Teks