Owler, L. (1970). Wheldon's Costing Simplied Lwj. Owler. MacDonald & Evnas.
Chicago Style aipamenaOwler, LWJ. Wheldon's Costing Simplied Lwj. Owler. MacDonald & Evnas, 1970.
MLA aipamenaOwler, LWJ. Wheldon's Costing Simplied Lwj. Owler. MacDonald & Evnas, 1970.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.