Franklin

MLA

Breckenridge, F. C., and F. C Breckenridge. Improvement of Visual Aids for Air Navigation : Progress Report July 1, 1953 to February 28, 1954. .

APA

Breckenridge, F. C., & Breckenridge, F. C. Improvement of visual aids for air navigation : progress report July 1, 1953 to February 28, 1954. .

Chicago

Breckenridge, F. C., and F. C Breckenridge. Improvement of Visual Aids for Air Navigation: Progress Report July 1, 1953 to February 28, 1954.