Gray, H. A. (1930). Some factors in the undergraduate careers of young college students with particular reference to Columbia and Barnard Colleges. Teachers College.
Citazione stile Chigago Style (17a edizione)Gray, Howard Aaron. Some Factors in the Undergraduate Careers of Young College Students with Particular Reference to Columbia and Barnard Colleges. New York City: Teachers College, 1930.
Citatione MLA (9a ed.)Gray, Howard Aaron. Some Factors in the Undergraduate Careers of Young College Students with Particular Reference to Columbia and Barnard Colleges. Teachers College, 1930.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.