La belle epoque : : Belgian posters, watercolors and drawings ; From the Collection of L. Wittamer-De Camps (exhibition Washington, Library of Congress, 1971).

MLA

Oostens-Wittamer, Yolande, and Emile Langui. La Belle Epoque : Belgian Posters, Watercolors and Drawings ; From the Collection of L. Wittamer-de Camps (exhibition Washington, Library of Congress, 1971). Washington: Library of Congress, 1971.

APA

Oostens-Wittamer, Y., & Langui, E. (1971). La belle epoque : Belgian posters, watercolors and drawings ; From the Collection of L. Wittamer-De Camps (exhibition Washington, Library of Congress, 1971). Washington: Library of Congress.

Chicago

Oostens-Wittamer, Yolande, and Emile Langui. La Belle Epoque: Belgian Posters, Watercolors and Drawings ; From the Collection of L. Wittamer-De Camps (exhibition Washington, Library of Congress, 1971). Washington: Library of Congress, 1971.