Gevirtz, Don, author
G.P. Putnam`s Sons, 1984
Buku Teks
Aiden, Erez, author
Riverhead Books, 2014
Buku Teks
Sills, Theodore R
Richard D.Irwin,Inc, 1951
Buku Teks
White, Edwin Harold
Prentice-Hall, 1980
Buku Teks
Spellman, Susan V., author
Oxford University Press, 2016
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