Dreyfuss, H. (1972). Symbol sourcebook: An authoritative guide to International graphic symbols. McGraw-Hill Book.
Citace podle Chicago (17th ed.)Dreyfuss, Henry. Symbol Sourcebook: An Authoritative Guide to International Graphic Symbols. New York: McGraw-Hill Book, 1972.
Citace podle MLA (9th ed.)Dreyfuss, Henry. Symbol Sourcebook: An Authoritative Guide to International Graphic Symbols. McGraw-Hill Book, 1972.
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