APA (7e ed.) Bronvermelding

Sommer, J. A. (1950). School attitudes for youth. Queen's Work.

Chicago (17e ed.) Bronvermelding

Sommer, Joseph A. School Attitudes for Youth. St. Louis, Mo.: Queen's Work, 1950.

MLA (8e ed.) Bronvermelding

Sommer, Joseph A. School Attitudes for Youth. Queen's Work, 1950.