APA (7th ed.) Zitazioa
Schaeffer, F. A. (1971). True spirituality. Tyndale House Publishers.
Chicago Style (17th ed.) Zitazioa
Schaeffer, Francis A. True Spirituality. Wheaton: Tyndale House Publishers, 1971.
MLA (9th ed.) Zitazioa
Schaeffer, Francis A. True Spirituality. Tyndale House Publishers, 1971.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.