Wagner, C. P. (1971). Frontiers in missionary strategy. Moody Press.
Cita Chicago (17th ed.)Wagner, C. Peter. Frontiers in Missionary Strategy. Chicago: Moody Press, 1971.
Cita MLA (9th ed.)Wagner, C. Peter. Frontiers in Missionary Strategy. Moody Press, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.