APA
Thorpe E. a. S., .Concise General Knowledge Manual (2005). : Pearson.
Chicago
Thorpe Edgar and Showick, .Concise General Knowledge Manual (2005). : Pearson.
Harvard
Thorpe E. a. S., .Concise General Knowledge Manual (2005). : Pearson.
MLA
Thorpe Edgar and Showick, .: Pearson. .