Konsep manusia ideal dalam pemikiran Hamka the concept of ideal man in Hamka thoughts Elfi dan Damardjati Supadjar
 Artikel Jurnal
Amery, L.S.
Thoughts on the constitution
Oxford University Press, 1953
 Buku Teks
Park, Won
Thoughts of a Korean
Inka University Press, 1970
 Buku Teks SO
Pringle, John Martin Douglas, 1912-
On second thoughts
Angus and Robertson, 1971
 Buku Teks SO
Hwang, Soon-Won
A Man
Jimoondang Publishing Company, 2003
 Buku Teks