Bibliografi : hlm. d-1- d-2
No Inv.: 77971/01/1c
No Inv.: 110853-110857/P/Perp/07/5c
No Inv.: 117058-117060/P/Perp/09/3c
No Inv.: 129286/SM/Perp/11/1c
No Inv.: 90786-90789/P/Perp/05/4c~105127/S/Perp/06/1c~106621-106625/P/Perp/06/5c
No Inv.: 116491-116493/P/Perp/09/3c
Judul asli : "The Skill of Communicating"
No Inv.: 3707-3711/P/Perp/92/5c~658/S/Perp/89/1c