Lua APA (7ú heag.)
Johnstone, P. (1978). Operation world: A day to day guide to praying for the world. WEC Publications.
Lua i Stíl Chicago (17ú heag.)
Johnstone, Patrick. Operation World: A Day to Day Guide to Praying for the World. England: WEC Publications, 1978.
Lua MLA (9ú heag.)
Johnstone, Patrick. Operation World: A Day to Day Guide to Praying for the World. WEC Publications, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.