Liddell, Alix
The girl guides 1910-1970
Frederick Muller, 1970
 Buku Teks
Passante, Christopher K.
The complete ideal's guides : journalism
Prenada Media Group, 2008
 Buku Teks SO
Robinson, Robert T.
Workbook of study guides with solutions
Richard D. Irwin Inc., 1969
 Buku Teks
Bolleau, Janet
Insight pocket guides Jakarta
APA Publications (HK) , 1991
 Buku Teks SO
Australia : berlits pocket guides
Falk-Verlag, 1994
 Buku Teks SO