Harborne, J.B., author
Academic Press, 1984
Buku Teks
Salisbury, Frank B., author
Wadsworth, 1985
Buku Referensi
Esau, Katherine, author
John Wiley & Sons, 1953
Buku Teks
Rao, K.N., author
S. Chand & Co, 1970
Buku Teks
Meyer, Bernard S., author
D. Van Nostrand, 1962
Buku Teks