APA (7th ed.) Zitazioa
Swindoll, C. R. (1990). Three steps forward, two steps back (Rev. ed.). T. Nelson.
Chicago Style (17th ed.) Zitazioa
Swindoll, Charles R. Three Steps Forward, Two Steps Back. Rev. ed. Nashville: T. Nelson, 1990.
MLA (9th ed.) Zitazioa
Swindoll, Charles R. Three Steps Forward, Two Steps Back. Rev. ed. T. Nelson, 1990.
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