Peccei, Aurelio
Before it is too late
Kodansha International, 2009
 Buku Teks
Nainggolan, Kaman
Pertanian Indonesia kini dan esok : agriculture is too important to be left to the government
Pustaka Sinar Harapan, 2005
 Buku Teks
Phillips, Jack J.
Investing in your company's human capital: strategies to avoid spending too little--or too much
American Management Association;, 2005
 eBooks
Ryan, Cornelius
A bridge too far
Hamilton, 1974
 Buku Teks SO
Too, Lillian
Lillian too's book of gold: cara bijak untuk mencapai kesehatan, kesejahteraan, dan kebahagiaan / Lillian Too
Gramedia, , 2005
 Buku Teks