Pengarang : Rospita Adelina Siregar {et.al} - Ani Wijayati - Raffles Antonius Pardede - Richard Nelson - Regina Dyah Pradani -

Pengarang : Snell, Richard S. - Maulany, R.F - M.S.Sjamsir -

Pengarang : Johnson, Richard J - John Feehally - Jurgen Floege -

Pengarang : Stuart Ralston {et.al} - Ian Penman - Mark Strachan - Richard Hobson -

Pengarang : Behrman, Richard E. - Nelson, Waldo E -

Pengarang : Behrman, Richard E - Ann M Arvin -

Pengarang : Nina F. Schor, Joseph W. St. Gemee III, Richard E. Behrman -

Pengarang : Richard A. Polin, Anne A. Gershon -

Pengarang : Anthony Giddens {et.al} - Mitchell Duneier - Richard P. Appelbaum - Deborah Carr -

Pengarang : Spears, Richard A -