Horwitz, R. (1973). Realities of profitability. pan books.
Chicago Style aipamenaHorwitz, Ralph. Realities of Profitability. London: pan books, 1973.
MLA aipamenaHorwitz, Ralph. Realities of Profitability. pan books, 1973.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.