APA (7th ed.) Citation

James, H. "A Most Unholy Trade," Being Letters on the Drama by Henry James.

Chicago Style (17th ed.) Citation

James, Henry. "A Most Unholy Trade," Being Letters on the Drama by Henry James.

MLA (9th ed.) Citation

James, Henry. "A Most Unholy Trade," Being Letters on the Drama by Henry James.

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