APA (7e ed.) Bronvermelding
Johnstone, P. (1978). Operation world: A day to day guide to praying for the world. WEC Publications.
Chicago (17e ed.) Bronvermelding
Johnstone, Patrick. Operation World: A Day to Day Guide to Praying for the World. England: WEC Publications, 1978.
MLA (9e ed.) Bronvermelding
Johnstone, Patrick. Operation World: A Day to Day Guide to Praying for the World. WEC Publications, 1978.
Let op: Deze citaties zijn niet altijd 100% accuraat.