Cita APA (7a ed.)

Powderly, L. E. (1951). A world tour: A curriculum resource guide for teachers ; (tenth grade common learnings). Public Schools.

Cita Chicago Style (17a ed.)

Powderly, Leonard E. A World Tour: A Curriculum Resource Guide for Teachers ; (tenth Grade Common Learnings). St. Paul, Minnesota: Public Schools, 1951.

Cita MLA (9a ed.)

Powderly, Leonard E. A World Tour: A Curriculum Resource Guide for Teachers ; (tenth Grade Common Learnings). Public Schools, 1951.