Bibliografi : hlm. 239-242 No Inv.: 135534 /SM/Perp/13/1c
Bibliografi : hlm. 203
Bibliografi : hlm. 487
Bibliografi : hlm. 249
No Inv.: 134473/SM/Perp/13/1c~135593/SM/Perp/13/1c
No Inv.: 472-474/P/Perp/92/3c
Judul asli : "Leaders"
Bibliografi : hlm. 122-123