Daugherty, S. R., & Schwenker, J. A. (2000). USMLE step 1: Test taking and study strategies guide. Kaplan Educational Centers.
Lua i Stíl Chicago (17ú heag.)Daugherty, Steven R., agus Judy A. Schwenker. USMLE Step 1: Test Taking and Study Strategies Guide. [s.l.]: Kaplan Educational Centers, 2000.
Lua MLA (9ú heag.)Daugherty, Steven R., agus Judy A. Schwenker. USMLE Step 1: Test Taking and Study Strategies Guide. Kaplan Educational Centers, 2000.
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