Krutz, W. (1981). Facing the issues 3. Baker book house.
Chicago Style (17th ed.) ZitazioaKrutz, William. Facing the Issues 3. Grnd Rapids: Baker book house, 1981.
MLA (9th ed.) ZitazioaKrutz, William. Facing the Issues 3. Baker book house, 1981.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.