APA (7th ed.) Citation

International Congress of Slavists (1963, Sofia), & International Congress of Slavists. American contributions to the Fifth International Congress of Slavists: Sofia, September 1963. Mouton.

Chicago Style (17th ed.) Citation

International Congress of Slavists (1963, Sofia), and International Congress of Slavists. American Contributions to the Fifth International Congress of Slavists: Sofia, September 1963. The Hague: Mouton.

MLA (8th ed.) Citation

International Congress of Slavists (1963, Sofia), and International Congress of Slavists. American Contributions to the Fifth International Congress of Slavists: Sofia, September 1963. Mouton.