Columba, M. (1926). A study of interests and their relations to other factors of achievement in the elementary school subjects. Catholic Education Press.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Columba, Mary. A Study of Interests and Their Relations to Other Factors of Achievement in the Elementary School Subjects. Washington, D.C.: Catholic Education Press, 1926.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Columba, Mary. A Study of Interests and Their Relations to Other Factors of Achievement in the Elementary School Subjects. Catholic Education Press, 1926.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.