Mott, Frank Luther, author
Macmillan, 1956
Buku Teks
Link, Arthur S., author
Alfreda A. Knopf, 1955
Buku Teks
Link, Arthur S., author
Alfreda A. Knopf, 1963
Buku Teks
Odum, Howard W., author
Longmans Green, 1951
Buku Teks
Odum, Howard W., author
Longmans Green, 1951
Buku Teks