Alessandrini, S. D. (1987). Unofficial economy: Consequences and perspectives in different economic systems.
استشهاد بنمط شيكاغوAlessandrini, Sergio; Dallago. Unofficial Economy: Consequences and Perspectives in Different Economic Systems. Gower Publilshing Company Ltd., England, 1987.
MLA استشهادAlessandrini, Sergio; Dallago. Unofficial Economy: Consequences and Perspectives in Different Economic Systems. 1987.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.