Betts, E. A., Frost, B., Jupo, F., McGee, M., Polgreen, J., & Robertson, M. (1950). Adventures now and then. American Book Company.
Lua i Stíl Chicago (17ú heag.)Betts, Emmett A., Bruno Frost, Frank Jupo, Millard McGee, John Polgreen, agus Maurice Robertson. Adventures Now and Then. New York : Cincinnati : Chicago : Boston : Atlanta : Dallas : San Francisco: American Book Company, 1950.
Lua MLA (8ú heag.)Betts, Emmett A., et al. Adventures Now and Then. American Book Company, 1950.
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