APA-čujuhus (7. p.)
Hayford, J. W. (1977). Prayer is invading the impossible. Logos international.
Chicago-čujuhus (17. p.)
Hayford, Jack W. Prayer Is Invading the Impossible. New Jersey: Logos international, 1977.
MLA-čujuhus (9. p.)
Hayford, Jack W. Prayer Is Invading the Impossible. Logos international, 1977.
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