Westcott, Cynthia, author
D. Van Nostrand, 1955
Buku Referensi
Goodwin, T.W., author
Pergamon Press, 1983
Buku Teks
Eames, Arthur J., author
McGraw-Hill , 1953
Buku Teks
Polunin, Nicholas, author
Gadjah Mada University Press, 1990
Buku Teks
Ulrich Gisi
Springer, 2010
Buku Teks