Sincero, Jen, author
Running Press, 2017
Buku Teks
Koch, Richard, author
Bhuana Ilmu Populer, 2004
Buku Teks
Levine, Karen
Vermont Storey Books, 1996
Buku Teks
Maxwell, John C., author
MIC , 2016
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Snow, Patrick, author
Gramedia, 2005
Buku Teks