Williamson, T. (1996). What makes it a heap? Kluwer Academic Publishers.
Chicago Style aipamenaWilliamson, T. What Makes It a Heap? Kluwer Academic Publishers, 1996.
MLA aipamenaWilliamson, T. What Makes It a Heap? Kluwer Academic Publishers, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.