Yapp, N., & Hopkinson, A. (1995). 150 years of photo journalism: The Hulton Getty Picture Collection. Nick Yapp (Part I); Amanda Hopkinson (Part II). Könemann.
Lua i Stíl Chicago (17ú heag.)Yapp, Nick, agus Amanda Hopkinson. 150 Years of Photo Journalism: The Hulton Getty Picture Collection. Nick Yapp (Part I); Amanda Hopkinson (Part II). Köln: Könemann, 1995.
Lua MLA (8ú heag.)Yapp, Nick, agus Amanda Hopkinson. 150 Years of Photo Journalism: The Hulton Getty Picture Collection. Nick Yapp (Part I); Amanda Hopkinson (Part II). Könemann, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.