APA (7th ed.) Citation

ProQuest (Firm). (1934). Report on communication companies. [publisher not identified].

Chicago Style (17th ed.) Citation

ProQuest (Firm). Report on Communication Companies. Washington: [publisher not identified], 1934.

MLA (9th ed.) Citation

ProQuest (Firm). Report on Communication Companies. [publisher not identified], 1934.

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