edited by Philip L. Wagner and Marvin W. Mikesell
University of Chicago Press, 1962
Buku Teks
edited by Philip L. Wagner, Marvin W. Mikesell
University of Chicago Press, 1962
Buku Referensi
Warf, Barney, editor
Springer, 2012
eBooks
Crang, Mike
Routledge, 1998
Buku Teks
Trewartha, Glenn T.
McGraw-Hill, 1967
Buku Teks