APA (7th ed.) Citation

Harries, E. P. Letter (copy): Basque children's concert.

Chicago Style (17th ed.) Citation

Harries, E. P. Letter (copy): Basque Children's Concert.

MLA (8th ed.) Citation

Harries, E. P. Letter (copy): Basque Children's Concert.

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