# John Sack

> American writer

**Wikidata**: [Q1408571](https://www.wikidata.org/wiki/Q1408571)  
**Source**: https://4ort.xyz/entity/john-sack-q1408571


## References

1. Integrated Authority File
2. general catalog of BnF
3. Virtual International Authority File
4. National Library of Israel Names and Subjects Authority File
5. [Regional Database of the Central Bohemian Research Library in Kladno](https://ipac.svkkl.cz/arl-kl/cs/detail-kl_us_auth-p0011263-Sack-John-R-1938)