APA (7th ed.) Citation

Frey, J. P. (1945). Craft unions of ancient and modern times. U.S.

Chicago Style (17th ed.) Citation

Frey, John Philip. Craft Unions of Ancient and Modern Times. Washington: U.S, 1945.

MLA (9th ed.) Citation

Frey, John Philip. Craft Unions of Ancient and Modern Times. U.S, 1945.

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