APA (7th ed.) Zitazioa
Laubach, F. C. (1946). Prayer: The mightiest force in the world. Fleming H. Revell Company.
Chicago Style (17th ed.) Zitazioa
Laubach, Frank Charles. Prayer: The Mightiest Force in the World. New York: Fleming H. Revell Company, 1946.
MLA (9th ed.) Zitazioa
Laubach, Frank Charles. Prayer: The Mightiest Force in the World. Fleming H. Revell Company, 1946.
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