Cita APA (7a ed.)

Henry, M., Clarke, D., & Vignos, J. (2001). US patent no. 6,311,136 B1: Digital flowmeter. United States Patent and Trademark Office.

Cita Chicago Style (17a ed.)

Henry, M., D. Clarke, y J. Vignos. US Patent No. 6,311,136 B1: Digital Flowmeter. United States Patent and Trademark Office, 2001.

Cita MLA (9a ed.)

Henry, M., et al. US Patent No. 6,311,136 B1: Digital Flowmeter. United States Patent and Trademark Office, 2001.