Lee, Ann Fuji, author
Routledge, Taylor & Francis Group, 2018
Buku Teks
Murphy, Bianca Cody, author
Cengage Learning, 2015
Buku Teks
Kahn, Robert L., 1918-, author
John Wiley & Sons, 1957
Buku Teks
McGraw-Hill/Glencoe, 2003
Buku Teks
Moffatt, Thomas L.
Harper & Row , 1979
Buku Teks