APA (7th ed.) Citation

Powell, L. C. (1942). Resources of western libraries for research in history. [publisher not identified].

Chicago Style (17th ed.) Citation

Powell, Lawrence Clark. Resources of Western Libraries for Research in History. [N.p.]: [publisher not identified], 1942.

MLA (9th ed.) Citation

Powell, Lawrence Clark. Resources of Western Libraries for Research in History. [publisher not identified], 1942.