Bibliografi : hlm. 269-270 No Inv.: 11532-11541/P/Perp/98/10c
Bibliografi : hlm. 183-184
Bibliografi : hlm. 263 - 264
Bibliografi : hlm./ 343-344 No Inv.: 133958/SM/Perp/13/1c~136180/SM/Perp/13/1c~135867/SM/Perp/13/1c
No Inv.: 131314,131154/SM/Perp/12/2c~135035/SM/Perp/13/1c~135299/SM/Perp/13/1c
No Inv.: 347/S/Perp/92/1c
No Inv.: 3557/Pb/Perp/91/1c
No Inv.: 5257-5259/S/Perp/86/3c~12813-12817/P/Perp/94/5c
Judul asli : "How to be an Effective Secretary"