„All Shows - PBS”. PBS (на језику: енглески). Архивирано из оригинала 15. 5. 2012. г. Приступљено 11. 6. 2018.CS1 одржавање: Формат датума (веза)
„PBS Funding Standards”. PBS. Архивирано из оригинала 20. 5. 2018. г. Приступљено 19. 5. 2018. „Public television is a major participant in the great tradition of a free and independent American press. To protect public television's journalistic integrity, PBS's funding standards are premised on core principles that ensure the complete editorial independence of producers from influence by underwriters. While funding and fundraising are necessary to support the development and production of content, producers must be free from the influence of funders. This firewall is essential to maintaining the public's trust.”CS1 одржавање: Формат датума (веза)
„All Shows - PBS”. PBS (на језику: енглески). Архивирано из оригинала 15. 5. 2012. г. Приступљено 11. 6. 2018.CS1 одржавање: Формат датума (веза)
„PBS Funding Standards”. PBS. Архивирано из оригинала 20. 5. 2018. г. Приступљено 19. 5. 2018. „Public television is a major participant in the great tradition of a free and independent American press. To protect public television's journalistic integrity, PBS's funding standards are premised on core principles that ensure the complete editorial independence of producers from influence by underwriters. While funding and fundraising are necessary to support the development and production of content, producers must be free from the influence of funders. This firewall is essential to maintaining the public's trust.”CS1 одржавање: Формат датума (веза)