Lewis, H. (1998). Body language: A guide for professionals. Response Books.
Lua i Stíl Chicago (17ú heag.)Lewis, Hedwig. Body Language: A Guide for Professionals. New Delhi ; Thousand Oaks, Calif.: Response Books, 1998.
Lua MLA (8ú heag.)Lewis, Hedwig. Body Language: A Guide for Professionals. Response Books, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.