Current economic problems
Richard D. Irwin, 1972
 Buku Teks
Philosophic problems: an introductory book of readings
edited by Maurice Mandelbaum, Francis W. Gramlich and Alan Ross Anderson
Macmillan, 1958
 Buku Teks SO
Kissinger, Henry A.
Problems of national strategy : a book of readings
Praeger, 1965
 Buku Teks
Philosophic problems: in introductory book of readings
edited by Maurice Mandelbaum, Francis W. Gramlich, and Alan Ross Anderson
Macmillan, 1957
 Buku Teks
Philosophic problems: an introductory book of readings
edited by Maurice Mandelbaum, Francis W. Gramlich and Alan Ross Anderson
Macmillan, 1957
 Buku Teks SO