Raven, Peter H.
Biology of plants
Worth Publisher, 1986
 Buku Referensi
Laetsch, Watson M.
Plants : basic concept in botany
Little, Brown, 1979
 Buku Teks
Corner, E.J.H.
The life of plants / E.J.H. Corner
The World Publishing Company, 1964
 Buku Teks
Schultz, Theodore W.
Agriculture in an ucstable economy / Theodore W. Schultz
McGraw-Hill , 1945
 Buku Teks
Raven, Peter H.
Biology of plants
Worth Publishers, 1992
 Buku Teks