Watt, William Montgomery
Islamic political thought the basic concepts
Edinburg University Press, 1980
 Buku Teks
Malone, Leo J.
Basic concepts of chemistry
John Wiley & Sons, 1981
 Buku Teks
Sherman, Alan
Basic concepts of chemistry
Houghton Mifflin, 1992
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Hafstrom, John E.
Basic concepts in modern mathematics
Addison-Wesely, 1961
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Malone, Leo J.
Basic concepts of chemistry
John Wiley & Sons, 1994
 Buku Teks