Howell, D. C. (2010). Statistical methods for psychology (7th ed.). Wadsworth/Cengage Learning.
Čikaški stil citiranja (17. izdanje)Howell, David C. Statistical Methods for Psychology. 7th ed. Belmont, Calif: Wadsworth/Cengage Learning, 2010.
MLA način citiranja (9. izdanje)Howell, David C. Statistical Methods for Psychology. 7th ed. Wadsworth/Cengage Learning, 2010.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.