APA (7th ed.) Citation

ProQuest (Firm). (1913). Postal policies and problems. [publisher not identified].

Chicago Style (17th ed.) Citation

ProQuest (Firm). Postal Policies and Problems. Washington: [publisher not identified], 1913.

MLA (9th ed.) Citation

ProQuest (Firm). Postal Policies and Problems. [publisher not identified], 1913.

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