APA (7th ed.) Citation

Gooch, G. P. (1948). Studies in German history. Longmans [u.a.].

Chicago Style (17th ed.) Citation

Gooch, George P. Studies in German History. London [u.a.]: Longmans [u.a.], 1948.

MLA (8th ed.) Citation

Gooch, George P. Studies in German History. Longmans [u.a.], 1948.