Gaya APA

Johnstone, P. (2001). Operating World : A Day-to-day Guide To Praying For The World (Trawas) . California: William Carey Library.

Gaya MLA

Johnstone, Partick. "Operating World : A Day-to-day Guide To Praying For The World (Trawas)". California: William Carey Library, 2001. Text.