Sonja Dümpelmann, John Beardsley.
Routledge, 2015
Buku Teks
edited by Francesco Vallerani and Francesco Visentin
Routledge, 2018
Buku Teks
Marsh, William M., author
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Buku Teks
Holden, Robert, author
Laurence King Publishing, 1996
Buku Referensi
Hill, W.F., author
Garden Art Press , 1995
Buku Referensi