APA-viite

Leanne, S. Say it like Obama: :the power of speaking with purpose and vision. TMH.

Chicago-tyylinen lähdeviittaus

Leanne, Shel. Say It like Obama: :the Power of Speaking with Purpose and Vision. 2009: TMH.

MLA-viite

Leanne, Shel. Say It like Obama: :the Power of Speaking with Purpose and Vision. TMH.