Gaya APA
Wilson, C. (1980).
The war against sleep: the philosophy of Gurdjieff. .
Wellingborough:
Wellingborough Aquarian Press.
Gaya MLA
Wilson, Colin.
"The war against sleep: the philosophy of Gurdjieff. ".
Wellingborough:
Wellingborough Aquarian Press,
1980.
Buku.