DeFalco, Tom; Sanderson, Peter; Brevoort, Tom; Teitelbaum, Michael; Wallace, Daniel; Darling, Andrew; Forbeck, Matt; Cowsill, Alan et al. (2019). The Marvel Encyclopedia. DK Publishing. p. 206. ISBN978-1-4654-7890-0.Se sugiere usar |número-autores= (ayuda)
Manning, Matthew K.; Gilbert, Laura, ed. (2012). «1960s». Spider-Man Chronicle Celebrating 50 Years of Web-Slinging. Dorling Kindersley. p. 40. ISBN978-0756692360. «Although he made his debut in the previous issue, it was in this [Stan] Lee and [John] Romita tale [The Amazing Spider-Man #51] that the Kingpin – real name Wilson Fisk – really left his mark on organized crime.»