APA Style

SILLS, D, L. (1968). INTERNATIONAL ENCYCLOPEDIA OF THE SOCIAL SCIENCES (1). New York: The Macmillan Company (New York).

MLA Style

SILLS, DAVID, L.. "INTERNATIONAL ENCYCLOPEDIA OF THE SOCIAL SCIENCES". 1 New York: The Macmillan Company (New York), 1968. المصادر المراجع.