APA引文

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引文

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

警告：這些引文格式不一定是100％准確.