APA (7th ed.) Zitazioa
Engstrom, T. W., & Larson, R. C. (1984). Motivation to last a lifetime. Zondervan Pub. House.
Chicago Style (17th ed.) Zitazioa
Engstrom, Theodore Wilhelm, eta Robert C. Larson. Motivation to Last a Lifetime. Grand Rapids, Mich.: Zondervan Pub. House, 1984.
MLA (9th ed.) Zitazioa
Engstrom, Theodore Wilhelm, eta Robert C. Larson. Motivation to Last a Lifetime. Zondervan Pub. House, 1984.
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