Parnes, H. S. (1956). Union strike votes: Current practice and proposed controls. s.n.
Citazione stile Chigago Style (17a edizione)Parnes, Herbert S. Union Strike Votes: Current Practice and Proposed Controls. Princeton: s.n, 1956.
Citatione MLA (9a ed.)Parnes, Herbert S. Union Strike Votes: Current Practice and Proposed Controls. s.n, 1956.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.