Lange's handbook of chemistry
edited by John A. Dean, Norbert Adolph Lange
McGraw-Hill, 1985
 Buku Referensi
Lange's handbook of chemistry
edited by John A. Dean
McGraw-Hill, 1973
 Buku Referensi
Lawrence, Eleanor
Henderson's dictionary of biological terms : tenth edition
John Wiley & Sons, 1989
 Buku Teks
Indonesian capital market directory 1999 : tenth edition
nstitute for Economic and Financial Research
Ecfin, 1999
 Buku Referensi
Browning, Carl H.
Muir & Ritchie's manual of bacteriology : tenth edition
Oxford University Press, 1937
 Buku Referensi