APA (7th ed.) Citation

Porter, R. P. (1884). Protection and free trade today, at home and abroad, in field and workshop. Osgood.

Chicago Style (17th ed.) Citation

Porter, Robert P. Protection and Free Trade Today, at Home and Abroad, in Field and Workshop. Boston: Osgood, 1884.

MLA (9th ed.) Citation

Porter, Robert P. Protection and Free Trade Today, at Home and Abroad, in Field and Workshop. Osgood, 1884.