Source: https://www.amazon.com/Emotionally-Focused-Workbook-Couples-Two/dp/041574248X/ref=pd_cp_14_3?_encoding=UTF8&pd_rd_i=041574248X&pd_rd_r=C7Z5TAXD16VDDTJD91B4&pd_rd_w=dH8Os&pd_rd_wg=sPHsx&psc=1&refRID=C7Z5TAXD16VDDTJD91B4