APA (7th ed.) Citation

Duden, K. (1958). The Duden pictorial encyclopedia in five languages: English, French, German, Italian, Spanish (2d, enl. ed.). F. Ungar Pub. Co..

Chicago Style (17th ed.) Citation

Duden, Konrad. The Duden Pictorial Encyclopedia in Five Languages: English, French, German, Italian, Spanish. 2d, enl. ed. New York: F. Ungar Pub. Co., 1958.

MLA (9th ed.) Citation

Duden, Konrad. The Duden Pictorial Encyclopedia in Five Languages: English, French, German, Italian, Spanish. 2d, enl. ed. F. Ungar Pub. Co., 1958.