APA-čujuhus (7. p.)

United States. Army. Signal Corps; United States. War Department. The Homing Pigeon.

Chicago-čujuhus (17. p.)

United States. Army. Signal Corps; United States. War Department. The Homing Pigeon.

MLA-čujuhus (9. p.)

United States. Army. Signal Corps; United States. War Department. The Homing Pigeon.

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