Sommer, J. A. (1950). School attitudes for youth. Queen's Work.
Cita Chicago Style (17a ed.)Sommer, Joseph A. School Attitudes for Youth. St. Louis, Mo.: Queen's Work, 1950.
Cita MLA (8a ed.)Sommer, Joseph A. School Attitudes for Youth. Queen's Work, 1950.
Precaución: Estas citas no son 100% exactas.