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Chambers, Oswald; My Utmost For His Highest; Dodd, Mead, & Co.; New York; 1935.

Greenleaf, Robert K.; Servant Leadership; Paulist Press; New York; 1977.

Guiness, Os; Rising to the Call; W Publishing Group, a Division of Thomas Nelson; Nashville; 2003.

Mannoia, Kevin W.; The Integrity Factor: A Journey in Leadership Formation; Light and Life Publishers; Indianapolis; 1997.

Jacobsen, Douglas & Sawatsky, Rod; Gracious Christianity; Baker Academic; Grand Rapids; 2006.

Nee, Watchman; Sit, Walk, Stand; Tyndale House Publishers; Wheaton, IL.; 1977.

Palmer, Phoebe; Full Salvation; Schmul Publishers; Salem, OH; 1977.

Sherman, Doug and Hendricks, William; Your Work Matters to God; NavPress; Colorado Springs; 1987.

Wilkens, Steve; Beyond Bumper Sticker Ethics; InterVarsity Press; Downers Grove; 1995.