Sills, M. D. (2016). Hearts, heads, & hands: A manual for teaching others to teach others. B & H Publishing Group.
Citazione stile Chigago Style (17a edizione)Sills, M. David. Hearts, Heads, & Hands: A Manual for Teaching Others to Teach Others. Nashville, Tennessee: B & H Publishing Group, 2016.
Citatione MLA (9a ed.)Sills, M. David. Hearts, Heads, & Hands: A Manual for Teaching Others to Teach Others. B & H Publishing Group, 2016.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.