Phelps, F. W. (1922). Seven nights debates on closed shop and open shop: These debates are the most valuable extracts taken from the debates of 77 debaters. Seattle, Wash.: School of Utilitarian Economics.

Phelps, Frank Wesley. Seven Nights Debates On Closed Shop and Open Shop: These Debates Are the Most Valuable Extracts Taken From the Debates of 77 Debaters. Seattle, Wash.: School of Utilitarian Economics, 1922.

Phelps, Frank Wesley. Seven Nights Debates On Closed Shop and Open Shop: These Debates Are the Most Valuable Extracts Taken From the Debates of 77 Debaters. Seattle, Wash.: School of Utilitarian Economics, 1922.