APA (7th ed.) Zitazioa
Packer, J. (1984). Keep in step with the spirit. Inter-Varsity.
Chicago Style (17th ed.) Zitazioa
Packer, J.I. Keep in Step with the Spirit. New Jersey: Inter-Varsity, 1984.
MLA (9th ed.) Zitazioa
Packer, J.I. Keep in Step with the Spirit. Inter-Varsity, 1984.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.