B Cert. Aaron Yapp , n.d..
Birth certificate for Humphrey Yapp , n.d..
D. Cert Aaron Yapp, n.d..
Helen Anderson (nee Yapp), n.d..
Maree Johnston emails , 29/6/2000.
Maree Johnston's family bible (n.p.: n.pub., n.d.).
Marriage certificate for Arthur Aaron Yapp , n.d..
Marriage certificate of James Yapp to Caroline Price
, n.d..
Tombstone, Gladys Yapp , n.d..