Folomkina, S., author
Moscow State Publishing House
Buku Referensi
edited by Colin Howlett
Oxford University Press, 1996
Buku Referensi
edited by P. S. Falla
Clarendon Press, 1990
Buku Referensi
Pogadaev, Victor, author
Gramedia Pustaka Utama, 2010
Buku Referensi
O`brien, M.A., author
Dover Publications, 1944
Buku Referensi