Alessandrini, S. D. (1987). Unofficial economy: Consequences and perspectives in different economic systems.
Chicago Style aipamenaAlessandrini, Sergio; Dallago. Unofficial Economy: Consequences and Perspectives in Different Economic Systems. Gower Publilshing Company Ltd., England, 1987.
MLA aipamenaAlessandrini, Sergio; Dallago. Unofficial Economy: Consequences and Perspectives in Different Economic Systems. 1987.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.