Tamm, Eric Enno. "The Horse That Leaps Through Clouds: A Tale of Espionage, the Silk Road and the Rise of Modern China." Vancouver: Douglas & McIntyre, 2010, pp. 364. See http://horsethatleaps.com (页面存档备份,存于互联网档案馆)
Tamm, Eric Enno. "The Horse That Leaps Through Clouds: A Tale of Espionage, the Silk Road and the Rise of Modern China." Vancouver: Douglas & McIntyre, 2010, p. 368. See http://horsethatleaps.com (页面存档备份,存于互联网档案馆)
Tamm, Eric Enno. "The Horse That Leaps Through Clouds: A Tale of Espionage, the Silk Road and the Rise of Modern China." Vancouver: Douglas & McIntyre, 2010, pp. 367. See http://horsethatleaps.com (页面存档备份,存于互联网档案馆)
Liukkonen, Petri. Baron Carl Gustav (Emil) Mannerheim. Books and Writers (kirjasto.sci.fi). Finland: Kuusankoski Public Library. [2015-08-05]. (原始内容存档于2015-02-10).
Tamm, Eric Enno. "The Horse That Leaps Through Clouds: A Tale of Espionage, the Silk Road and the Rise of Modern China." Vancouver: Douglas & McIntyre, 2010, pp. 364. See http://horsethatleaps.com (页面存档备份,存于互联网档案馆)
Tamm, Eric Enno. "The Horse That Leaps Through Clouds: A Tale of Espionage, the Silk Road and the Rise of Modern China." Vancouver: Douglas & McIntyre, 2010, p. 368. See http://horsethatleaps.com (页面存档备份,存于互联网档案馆)
Liukkonen, Petri. Baron Carl Gustav (Emil) Mannerheim. Books and Writers (kirjasto.sci.fi). Finland: Kuusankoski Public Library. [2015-08-05]. (原始内容存档于2015-02-10).
Tamm, Eric Enno. "The Horse That Leaps Through Clouds: A Tale of Espionage, the Silk Road and the Rise of Modern China." Vancouver: Douglas & McIntyre, 2010, pp. 367. See http://horsethatleaps.com (页面存档备份,存于互联网档案馆)