APA (7th ed.) Citation

Humphreys, G. H. W., & Jones, C. R. The manufacture of sole and other heavy leathers.

Chicago Style (17th ed.) Citation

Humphreys, G. H. W., and C. R. Jones. The Manufacture of Sole and Other Heavy Leathers.

MLA (9th ed.) Citation

Humphreys, G. H. W., and C. R. Jones. The Manufacture of Sole and Other Heavy Leathers.

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