The Source book ;
an international encyclopedic authority written from the new world viewpoint /
prepared by over two hundred authorities in the fields of literature, art, and science.

APA Citation

Rocheleau, W. F. (William Francis)., Perpetual Encyclopedia Corporation. (1926). The Source book: an international encyclopedic authority written from the new world viewpoint. Chicago [etc.]: Perpetual encyclopedia corporation.

MLA Citation

Rocheleau, W. F. (William Francis), and Perpetual Encyclopedia Corporation. The Source Book: an International Encyclopedic Authority Written From the New World Viewpoint. Chicago [etc.]: Perpetual encyclopedia corporation, 1926.

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