APA-viite (7. p.)

Krug, R. (1998). Usmle step 1 Review Series: Behavioral Sciences U S Health Care Biostatistics & Epidemiology. s.n.

Chicago-viite (17. p.)

Krug, Ronald. Usmle Step 1 Review Series: Behavioral Sciences U S Health Care Biostatistics & Epidemiology. Chicago: s.n, 1998.

MLA-viite (9. p.)

Krug, Ronald. Usmle Step 1 Review Series: Behavioral Sciences U S Health Care Biostatistics & Epidemiology. s.n, 1998.

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