Kremkau, F. W. (2006). Diagnostic ultrasound: Principles and instruments (Seventh edition.). Elsevier/Saunders.
Lua i Stíl Chicago (17ú heag.)Kremkau, Frederick W. Diagnostic Ultrasound: Principles and Instruments. Seventh edition. St. Louis, Mo: Elsevier/Saunders, 2006.
Lua MLA (8ú heag.)Kremkau, Frederick W. Diagnostic Ultrasound: Principles and Instruments. Seventh edition. Elsevier/Saunders, 2006.
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