APA (7th ed.) Citation

Hubbard Merton H., Phipps Robert R., Thompson Richard L., & United States Patent Office. Low density coffee roasting process.

Chicago Style (17th ed.) Citation

Hubbard Merton H., Phipps Robert R., Thompson Richard L., and United States Patent Office. Low Density Coffee Roasting Process.

MLA (9th ed.) Citation

Hubbard Merton H., et al. Low Density Coffee Roasting Process.