de Roover, Raymond (1946). "The Three Golden Balls of the Pawnbrokers". Bulletin of the Business Historical Society. 20 (4): 117–124. doi:10.2307/3110507. ISSN1065-9048. JSTOR3110507.
de Roover, Raymond (1946). "The Three Golden Balls of the Pawnbrokers". Bulletin of the Business Historical Society. 20 (4): 117–124. doi:10.2307/3110507. ISSN1065-9048. JSTOR3110507.
nationalpawnbrokers.org
"Pawn Industry Statistics". nationalpawnbrokers.org. National Pawn Brokers Association. 7 October 2010. Retrieved 2 February 2016.
de Roover, Raymond (1946). "The Three Golden Balls of the Pawnbrokers". Bulletin of the Business Historical Society. 20 (4): 117–124. doi:10.2307/3110507. ISSN1065-9048. JSTOR3110507.