Portnykh, V. (2020). Constantinos Georgiou, Preaching the Crusades to the Eastern Mediterranean. Propaganda, Liturgy and Diplomacy, 1305–1352, Londres–New York, Routledge, 2018 ; 1 vol., xii–294 p. ISBN : 978-1-138-74370-0. Prix : GBP 120.
Lua i Stíl Chicago (17ú heag.)Portnykh, Valentin. Constantinos Georgiou, Preaching the Crusades to the Eastern Mediterranean. Propaganda, Liturgy and Diplomacy, 1305–1352, Londres–New York, Routledge, 2018 ; 1 vol., Xii–294 p. ISBN : 978-1-138-74370-0. Prix : GBP 120. 2020.
Lua MLA (8ú heag.)Portnykh, Valentin. Constantinos Georgiou, Preaching the Crusades to the Eastern Mediterranean. Propaganda, Liturgy and Diplomacy, 1305–1352, Londres–New York, Routledge, 2018 ; 1 vol., Xii–294 p. ISBN : 978-1-138-74370-0. Prix : GBP 120. 2020.