Duke Univ. Press, 1979
Buku Teks
university of California Press, 1972
Buku Teks
Todaro, Michael P., author
Erlangga, 2011
Buku Teks
edited by Gove Hambidge ; foreword by Teodoro Moscosco, introd. by Paul G. Hoffman
Frederick A. Praeger, 1964
Buku Teks
edited by Alan Gilbert
John Wiley & Sons, 1978
Buku Teks