Comments on the "letter to the editor"by Burrell
Artikel Jurnal
Letter to the editor: two problems posed by egghe
Artikel Jurnal
Letter to the editor: some remarks on a paper by egghe
Artikel Jurnal
Burrell, R.E.C.
Food from the fields: the story of farming / R.E.C. Burrell
Wheaton , 1980
Buku Teks SO
Ethics and politics : cases and comments
editor, Amy Gutmann, Dennis Thompson
Thomson wadsworth, 2006
Buku Teks SO