Lua APA (7ú heag.)
ebrary, Inc, & Machin, D. (2009). Sample size tables for clinical studies (3rd ed.). Wiley-Blackwell.
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc, agus David Machin. Sample Size Tables for Clinical Studies. 3rd ed. Chichester, UK ; Hoboken, NJ: Wiley-Blackwell, 2009.
Lua MLA (9ú heag.)
ebrary, Inc, agus David Machin. Sample Size Tables for Clinical Studies. 3rd ed. Wiley-Blackwell, 2009.
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