Dickins, S. J. (1910). Grenfell of the Congo: Pioneer missionary and explorer (4th ed.). National Sunday School Union.
Citace podle Chicago (17th ed.)Dickins, Shirley J. Grenfell of the Congo: Pioneer Missionary and Explorer. 4th ed. London: National Sunday School Union, 1910.
Citace podle MLA (8th ed.)Dickins, Shirley J. Grenfell of the Congo: Pioneer Missionary and Explorer. 4th ed. National Sunday School Union, 1910.
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