- http://cinema-hub.com person/2395946/
- http://KinoPod.ru person/dzheyk-keyffer.html
- FilmNavi.ru person/jake-keiffer_2339091
- kinotv.ru person/dzheyk-keyffer/
- ntvplus.tv person/dzhejk-kejffer-43993
- kinozal.tv persons.php?s=Джейк Кейффер
- beetv.kz ru-KZ/people/dzheik-keiffer
- irecommend.ru catalog/list/47-202898
- en.wikipedia.org Jac Schaeffer