Cita APA (7th ed.)
Crabb, L. J., & Alexander, D. B. (1984). Encouragement: The key to caring. Zondervan.
Cita Chicago (17th ed.)
Crabb, Lawrence J., i Dan B. Alexander. Encouragement: The Key to Caring. Michigan: Zondervan, 1984.
Cita MLA (9th ed.)
Crabb, Lawrence J., i Dan B. Alexander. Encouragement: The Key to Caring. Zondervan, 1984.
Atenció: Aquestes cites poden no estar 100% correctes.