A world tour :
a curriculum resource gude for teachers (10th grade core) /
prepared by Leonard Powderly, St. Paul Public Schools.

APA Citation

Saint Paul Public Schools., Powderly, L. (1951). A world tour: a curriculum resource gude for teachers (10th grade core). St. Paul, Minn.: Saint Paul Public Schools.

MLA Citation

Saint Paul Public Schools, and Leonard Powderly. A World Tour: a Curriculum Resource Gude for Teachers (10th Grade Core). St. Paul, Minn.: Saint Paul Public Schools, 1951.

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