Rosario, Teresita Cruz-Del, author
Palgrave Macmillan, 2016
Buku Teks
Palgrave Macmillan, 2012
Buku Teks
Dunung, Sanjyot P., author
Lexington Books, 1995
Buku Referensi
Skilling, Gordon H., author
Thomas Y. Crowell, 1966
Buku Teks
Beatley, Timothy, editor
Island Press, 2012
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