Earth's many voices.
2nd series ...
Pub. under the direction of the Committee of general literature and education appointed by the Society for promoting Christian knowledge.

APA Citation

Society for Promoting Christian Knowledge (Great Britain). General Literature Committee. (18). Earth's many voices: 2nd series ... London: Society for promoting Christian knowledge.

MLA Citation

Society for Promoting Christian Knowledge (Great Britain). General Literature Committee. Earth's Many Voices: 2nd Series ... London: Society for promoting Christian knowledge, 18.

Warning: These citations may not always be complete (especially for serials).