APA (7th ed.) Citation

R.L. Polk & Co. Polk's lumber directory of the United States. R.L. Polk & Co..

Chicago Style (17th ed.) Citation

R.L. Polk & Co. Polk's Lumber Directory of the United States. Chicago: R.L. Polk & Co..

MLA (8th ed.) Citation

R.L. Polk & Co. Polk's Lumber Directory of the United States. R.L. Polk & Co..

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