Sherrow, Victoria (30. marec 2001). For Appearance's Sake: The Historical Encyclopedia of Good Looks, Beauty, and Grooming. Connecticut: Greenwood Publishing. str. 180. doi:10.1336/1573562041. ISBN1-57356-204-1.
Mitchell, Claudia; Reid-Walsh, Jacqueline (30. december 2007). Girl Culture: An Encyclopedia. Connecticut: Greenwood Publishing. str. 396–397. doi:10.1336/0313339082. ISBN0-313-33908-2.
dx.doi.org
Günther Schneider, Sven Gohla, Jörg Schreiber, Waltraud Kaden, Uwe Schönrock, Hartmut Schmidt-Lewerkühne, Annegret Kuschel, Xenia Petsitis, Wolfgang Pape, Hellmut Ippen and Walter Diembeck "Skin Cosmetics" in Ullmann's Encyclopedia of Industrial Chemistry 2005, Wiley-VCH, Weinheim. DOI: 10.1002/14356007.a24_219