Blum, Mark
Bugs in 3-D
Chronicle Books, 1998
 Buku Referensi
Graves, Robert
The reader over your shoulder: a handbook for writers of English prose
Macmillan, 1943
 Buku Referensi
Katz, William A., 1924-
Your library : a reference guide
Holt, Rinehart and Winston, 1979
 Buku Teks
Shaffer, Rick
Your guide to the sky
Lowell House, 1999
 Buku Referensi
Pantry, Sheila
Your essential guide to career success
Facet Publishing, 2003
 Buku Teks