Ivanov, R. T. (2006). Roman cities in Bulgaria. Sofia: Bulgarian Bestseller--National Museum of Bulgarian Books and Polygraphy.
Чикагска система за цитиранеIvanov, Rumen Teofilov. Roman Cities in Bulgaria. Sofia: Bulgarian Bestseller--National Museum of Bulgarian Books and Polygraphy, 2006.
MLA формат за цитиранеIvanov, Rumen Teofilov. Roman Cities in Bulgaria. Sofia: Bulgarian Bestseller--National Museum of Bulgarian Books and Polygraphy, 2006.
Внимание: Тези цитати може да не са 100% точни.