The Columbia-Viking desk encyclopedia : volume two, L-Z / compiled and edited at Columbia University by the staff of the Columbia Encyclopedia. William Bridgwater, editor-in-chief
Viking Press, 1960
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The Columbia-Viking desk encyclopedia : volume one, A-K / compiled and edited at Columbia University by the staff of the Columbia Encyclopedia. William Bridgwater, editor-in-chief
Viking Press, 1960
 Buku Referensi
The Columbia encyclopedia
Columbia University Press, 1950
 Buku Referensi
The Columbia encyclopedia; Volume I
edited by William Bridgwater dan Seymour Kurtz
Columbia University Press, 1963
 Buku Referensi
The Columbia encyclopedia; Volume II
edited by William Bridgwater dan Seymour Kurtz
Columbia University Press, 1963
 Buku Referensi