The New complete medical and health encyclopedia; Volume one
edited by Richard J. Wagman
J.G. Ferguson Publishing, 1992
 Buku Referensi
The New complete medical and health encyclopedia; Volume two
edited by Richard J. Wagman
J.G. Ferguson Publishing, 1992
 Buku Referensi
The New complete medical and health encyclopedia; Volume three
edited by Richard J. Wagman
J.G. Ferguson Publishing, 1992
 Buku Referensi
The new illustrated science and invention encyclopedia : the new how it works : volume 2
H.S. Stuttman, 1989
 Buku Referensi
The new illustrated science and invention encyclopedia : the new how it works : volume 3
H.S. Stuttman, 1989
 Buku Referensi