APA (7th ed.) Citation

International Esperanto Congress. Drees speaking. Copied from collection W. Drees.

Chicago Style (17th ed.) Citation

International Esperanto Congress. Drees Speaking. Copied from Collection W. Drees.

MLA (8th ed.) Citation

International Esperanto Congress. Drees Speaking. Copied from Collection W. Drees.

Warning: These citations may not always be 100% accurate.