Hamka, author
Pustaka Islam, 1983
Buku Referensi
Hamka (Hadji Abdul Malik Karim Amrullah), 1908-1981, author
Pustaka Islam, 1981
Buku Referensi
National Electronics Conference
National Electronics Conference, 1962
eBooks
Dedi Arman, author
Balai Besar dan Pengembangan Pelayanan Kesejahteraan Sosial Yogyakarta, 2018
Artikel Jurnal
edited by Mortimer J. Adler
Encyclopedia Britanica, 1990
Buku Referensi