APA (7th ed.) Citation

ProQuest (Firm). (1929). Twenty-fifth anniversary of the first airplane flight. [publisher not identified].

Chicago Style (17th ed.) Citation

ProQuest (Firm). Twenty-fifth Anniversary of the First Airplane Flight. Washington: [publisher not identified], 1929.

MLA (9th ed.) Citation

ProQuest (Firm). Twenty-fifth Anniversary of the First Airplane Flight. [publisher not identified], 1929.

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