PHILLIPS, D. Z. (1981). The Concept of Prayer. Basil Blackwell.
Chicago Style (17th ed.) ZitazioaPHILLIPS, D. Z. The Concept of Prayer. Oxford: Basil Blackwell, 1981.
MLA (9th ed.) ZitazioaPHILLIPS, D. Z. The Concept of Prayer. Basil Blackwell, 1981.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.