Hopf, H. A., & Link, H. C. (1946). People and books: A study of reading and book-buying habits. Book Industry Committee, Book Manufacturers' Institute.
Lua i Stíl Chicago (17ú heag.)Hopf, Harry Arthur, agus Henry Charles Link. People and Books: A Study of Reading and Book-buying Habits. New York: Book Industry Committee, Book Manufacturers' Institute, 1946.
Lua MLA (9ú heag.)Hopf, Harry Arthur, agus Henry Charles Link. People and Books: A Study of Reading and Book-buying Habits. Book Industry Committee, Book Manufacturers' Institute, 1946.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.