Gerlach, Mary Jo Mirlenbrink
Assisting in long term care
Delmar, Cengage Learning, 2014
 Buku Teks
Long-term field studies of primates
edited by Peter M. Kappeler and David P. Watts
Springer, 2012
 eBooks
Quality first: a driving force to long-term profits
Perhimpunan manajemen mutu Indonesia
Indonesian QC Circles Convention , 1992
 Buku Referensi
Long term compression behavior of fibrous peat
 Artikel Jurnal
Distinctiveness effects in children's long-term retention
 Artikel Jurnal