Herzberg, M. J., Paine, M. P., & Works, A. M. (1943). Happy landings. Houghton Mifflin company.
Lua i Stíl Chicago (17ú heag.)Herzberg, Max J., Merrill P. Paine, agus Austin Melvin Works. Happy Landings. Boston : New York, etc.: Houghton Mifflin company, 1943.
Lua MLA (8ú heag.)Herzberg, Max J., et al. Happy Landings. Houghton Mifflin company, 1943.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.