Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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