Baker, Whitney (2011). "Soapbox for the automobile: Bumper sticker history, identification, and preservation". Collections: A Journal for Museum and Archives Professionals. 7 (2): 251–270. doi:10.1177/155019061100700302. hdl:1808/9874. S2CID110814097.
Baker, Whitney (2011). "Soapbox for the automobile: Bumper sticker history, identification, and preservation". Collections: A Journal for Museum and Archives Professionals. 7 (2): 251–270. doi:10.1177/155019061100700302. hdl:1808/9874. S2CID110814097.
Baker, Whitney (2011). "Soapbox for the automobile: Bumper sticker history, identification, and preservation". Collections: A Journal for Museum and Archives Professionals. 7 (2): 251–270. doi:10.1177/155019061100700302. hdl:1808/9874. S2CID110814097.