Schweitzer, G. K. (1965). The doctorate: A handbook. Thomas.
Lua i Stíl Chicago (17ú heag.)Schweitzer, George Keene. The Doctorate: A Handbook. Springfield, Ill: Thomas, 1965.
Lua MLA (9ú heag.)Schweitzer, George Keene. The Doctorate: A Handbook. Thomas, 1965.
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