Pollard, W. L., & Hart, A. W. (1920). Digest of decisions of law and practice in the Patent Office and the United States courts in patents, trade-marks, copyrights and labels, 1912-1919: A supplement to Pollard's digest, 1897-1912. J. Byrne..
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিPollard, W. L., এবং Amos W. Hart. Digest of Decisions of Law and Practice in the Patent Office and the United States Courts in Patents, Trade-marks, Copyrights and Labels, 1912-1919: A Supplement to Pollard's Digest, 1897-1912. Washington, D.C.: J. Byrne., 1920.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিPollard, W. L., এবং Amos W. Hart. Digest of Decisions of Law and Practice in the Patent Office and the United States Courts in Patents, Trade-marks, Copyrights and Labels, 1912-1919: A Supplement to Pollard's Digest, 1897-1912. J. Byrne., 1920.