Gallagher, R. P. (1930). Courses and careers. Harper & brothers.
Lua i Stíl Chicago (17ú heag.)Gallagher, Ralph P. Courses and Careers. New York : London: Harper & brothers, 1930.
Lua MLA (8ú heag.)Gallagher, Ralph P. Courses and Careers. Harper & brothers, 1930.
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