Crelyn, R.J.
Agrochemicals: preparation and mode of action
"Chichester: John Wiley & Sons, 1990",
 Buku Teks
Hill, John W., author
Chemistry and life: an introduction to general, organic and biological chemistry
Upper Saddle RIver Prentice Hall 1997,
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Hein, Morris, author
Foundation of college chemistry
"Monterey: Brooks Cole, 1984",
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Arah pengembangan pertanian: proceeding seminar periodik fakultas pertanian Universitas HKBP Nommensen Medan tahun 1997/editor, B.S. Sumbayak, Edwin S. Saragih, Sabam Malau
Medan Fakultas Pertanian Universitas HKBP Nomensen 1997,
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Bibliograf Khusus
Departemen Pertanian,
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