APA (7th ed.) Citation
Meyer, F. B. (1927). The call and challenge of the unseen. Missions of Biblical Education.
Chicago Style (17th ed.) Citation
Meyer, F. B. The Call and Challenge of the Unseen. Toronto: Missions of Biblical Education, 1927.
MLA (9th ed.) Citation
Meyer, F. B. The Call and Challenge of the Unseen. Missions of Biblical Education, 1927.
Warning: These citations may not always be 100% accurate.