APA (7th ed.) Citation

Helm, P. J. (1961). History of Europe 1450-1660 / by P.J. Helm. Bell.

Chicago Style (17th ed.) Citation

Helm, P. J. History of Europe 1450-1660 / by P.J. Helm. Bell, 1961.

MLA (9th ed.) Citation

Helm, P. J. History of Europe 1450-1660 / by P.J. Helm. Bell, 1961.

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