(1972). Books about books: An international exhibition on the occasion of the International Book Year 1972 proclaimed by UNESCO = Bücher über Bücher = Livres sur les livres.
Chicago Style (17th ed.) CitationBooks About Books: An International Exhibition on the Occasion of the International Book Year 1972 Proclaimed by UNESCO = Bücher über Bücher = Livres Sur Les Livres. Frankfurt, 1972.
MLA (9th ed.) CitationBooks About Books: An International Exhibition on the Occasion of the International Book Year 1972 Proclaimed by UNESCO = Bücher über Bücher = Livres Sur Les Livres. 1972.
Warning: These citations may not always be 100% accurate.